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nuprl-staging

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pointer-aliasing-intermediate-v2

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Northeastern University PRL 14

class A: def __init__(self, txt: str): self.p: B = None self.s: A = None self.txt = txt class B: def __init__(self, txt: str): self.x: B = None self.txt = txt g = A("g") i = B("i") b = A("b") h = B("h") a = A("a") f = A("f") c = B("c") g.p = c g.s = b i.x = h b.p = c b.s = g h.x = c a.p = c a.s = b f.p = c f.s = g c.x = h assert g.p.x.x.x.x.x.x.txt == "

c"

class A: def __init__(self, txt: str): self.p: B = None self.s: A = None self.txt = txt class B: def __init__(self, txt: str): self.x: B = None self.txt = txt g = A("g") i = B("i") b = A("b") h = B("h") a = A("a") f = A("f") c = B("c") g.p = c g.s = b i.x = h b.p = c b.s = g h.x = c a.p = c a.s = b f.p = c f.s = g c.x = h assert g.p.x.x.x.x.x.x.txt == "c"

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class A: def __init__(self, txt: str): self.x: B = None self.txt = txt class B: def __init__(self, txt: str): self.z: A = None self.r: A = None self.txt = txt i = A("i") h = B("h") d = A("d") f = B("f") j = B("j") e = B("e") a = A("a") i.x = h h.z = a h.r = i d.x = j f.z = i f.r = i j.z = a j.r = d e.z = i e.r = d a.x = e assert e.z.x.r.x.z.x.txt == "

e"

class A: def __init__(self, txt: str): self.x: B = None self.txt = txt class B: def __init__(self, txt: str): self.z: A = None self.r: A = None self.txt = txt i = A("i") h = B("h") d = A("d") f = B("f") j = B("j") e = B("e") a = A("a") i.x = h h.z = a h.r = i d.x = j f.z = i f.r = i j.z = a j.r = d e.z = i e.r = d a.x = e assert e.z.x.r.x.z.x.txt == "e"

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class A: def __init__(self, txt: str): self.p: B = None self.s: A = None self.txt = txt class B: def __init__(self, txt: str): self.s: A = None self.txt = txt a = A("a") i = B("i") d = A("d") c = B("c") g = A("g") a.p = c a.s = g i.s = g d.p = c d.s = g c.s = g g.p = i g.s = a assert c.s.p.s.txt == "

g"

class A: def __init__(self, txt: str): self.p: B = None self.s: A = None self.txt = txt class B: def __init__(self, txt: str): self.s: A = None self.txt = txt a = A("a") i = B("i") d = A("d") c = B("c") g = A("g") a.p = c a.s = g i.s = g d.p = c d.s = g c.s = g g.p = i g.s = a assert c.s.p.s.txt == "g"

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class A: def __init__(self, txt: str): self.s: B = None self.txt = txt class B: def __init__(self, txt: str): self.o: A = None self.t: A = None self.txt = txt d = A("d") b = B("b") e = B("e") h = A("h") a = A("a") i = B("i") g = B("g") d.s = g b.o = h b.t = d e.o = h e.t = h h.s = i a.s = b i.o = h i.t = d g.o = a g.t = a assert b.o.s.o.s.o.txt == "

h"

class A: def __init__(self, txt: str): self.s: B = None self.txt = txt class B: def __init__(self, txt: str): self.o: A = None self.t: A = None self.txt = txt d = A("d") b = B("b") e = B("e") h = A("h") a = A("a") i = B("i") g = B("g") d.s = g b.o = h b.t = d e.o = h e.t = h h.s = i a.s = b i.o = h i.t = d g.o = a g.t = a assert b.o.s.o.s.o.txt == "h"

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class A: def __init__(self, txt: str): self.x: A = None self.txt = txt class B: def __init__(self, txt: str): self.p: A = None self.txt = txt f = A("f") j = B("j") c = B("c") e = A("e") b = B("b") f.x = e j.p = e c.p = e e.x = f b.p = e assert b.p.x.x.x.x.txt == "

e"

class A: def __init__(self, txt: str): self.x: A = None self.txt = txt class B: def __init__(self, txt: str): self.p: A = None self.txt = txt f = A("f") j = B("j") c = B("c") e = A("e") b = B("b") f.x = e j.p = e c.p = e e.x = f b.p = e assert b.p.x.x.x.x.txt == "e"

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class A: def __init__(self, txt: str): self.w: A = None self.t: B = None self.txt = txt class B: def __init__(self, txt: str): self.v: A = None self.txt = txt d = A("d") j = B("j") a = A("a") f = B("f") d.w = a d.t = f j.v = d a.w = d a.t = f f.v = a assert f.v.t.v.w.txt == "

d"

class A: def __init__(self, txt: str): self.w: A = None self.t: B = None self.txt = txt class B: def __init__(self, txt: str): self.v: A = None self.txt = txt d = A("d") j = B("j") a = A("a") f = B("f") d.w = a d.t = f j.v = d a.w = d a.t = f f.v = a assert f.v.t.v.w.txt == "d"

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class A: def __init__(self, txt: str): self.t: B = None self.txt = txt class B: def __init__(self, txt: str): self.p: B = None self.q: B = None self.txt = txt f = A("f") j = B("j") a = B("a") e = B("e") f.t = e j.p = e j.q = e a.p = j a.q = j e.p = j e.q = a assert f.t.p.p.txt == "

e"

class A: def __init__(self, txt: str): self.t: B = None self.txt = txt class B: def __init__(self, txt: str): self.p: B = None self.q: B = None self.txt = txt f = A("f") j = B("j") a = B("a") e = B("e") f.t = e j.p = e j.q = e a.p = j a.q = j e.p = j e.q = a assert f.t.p.p.txt == "e"

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class A: def __init__(self, txt: str): self.v: B = None self.txt = txt class B: def __init__(self, txt: str): self.z: A = None self.txt = txt g = A("g") a = B("a") c = A("c") d = A("d") g.v = a a.z = g c.v = a d.v = a assert g.v.z.v.txt == "

a"

class A: def __init__(self, txt: str): self.v: B = None self.txt = txt class B: def __init__(self, txt: str): self.z: A = None self.txt = txt g = A("g") a = B("a") c = A("c") d = A("d") g.v = a a.z = g c.v = a d.v = a assert g.v.z.v.txt == "a"

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class A: def __init__(self, txt: str): self.q: A = None self.w: B = None self.txt = txt class B: def __init__(self, txt: str): self.y: B = None self.txt = txt a = A("a") g = B("g") d = B("d") i = A("i") h = B("h") f = A("f") a.q = f a.w = g g.y = d d.y = h i.q = a i.w = g h.y = d f.q = i f.w = d assert f.q.q.q.txt == "

f"

class A: def __init__(self, txt: str): self.q: A = None self.w: B = None self.txt = txt class B: def __init__(self, txt: str): self.y: B = None self.txt = txt a = A("a") g = B("g") d = B("d") i = A("i") h = B("h") f = A("f") a.q = f a.w = g g.y = d d.y = h i.q = a i.w = g h.y = d f.q = i f.w = d assert f.q.q.q.txt == "f"

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class A: def __init__(self, txt: str): self.v: B = None self.txt = txt class B: def __init__(self, txt: str): self.p: B = None self.r: A = None self.txt = txt e = A("e") g = B("g") c = B("c") e.v = g g.p = c g.r = e c.p = g c.r = e assert e.v.r.v.txt == "

g"

class A: def __init__(self, txt: str): self.v: B = None self.txt = txt class B: def __init__(self, txt: str): self.p: B = None self.r: A = None self.txt = txt e = A("e") g = B("g") c = B("c") e.v = g g.p = c g.r = e c.p = g c.r = e assert e.v.r.v.txt == "g"

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class A: def __init__(self, txt: str): self.y: B = None self.o: B = None self.txt = txt class B: def __init__(self, txt: str): self.y: A = None self.txt = txt c = A("c") f = B("f") i = A("i") c.y = f c.o = f f.y = i i.y = f i.o = f assert c.y.y.y.txt == "

f"

class A: def __init__(self, txt: str): self.y: B = None self.o: B = None self.txt = txt class B: def __init__(self, txt: str): self.y: A = None self.txt = txt c = A("c") f = B("f") i = A("i") c.y = f c.o = f f.y = i i.y = f i.o = f assert c.y.y.y.txt == "f"

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class A: def __init__(self, txt: str): self.z: B = None self.x: A = None self.txt = txt class B: def __init__(self, txt: str): self.x: B = None self.txt = txt g = A("g") e = B("e") j = A("j") b = B("b") g.z = e g.x = j e.x = b j.z = e j.x = g b.x = e assert b.x.x.x.txt == "

e"

class A: def __init__(self, txt: str): self.z: B = None self.x: A = None self.txt = txt class B: def __init__(self, txt: str): self.x: B = None self.txt = txt g = A("g") e = B("e") j = A("j") b = B("b") g.z = e g.x = j e.x = b j.z = e j.x = g b.x = e assert b.x.x.x.txt == "e"

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class A: def __init__(self, txt: str): self.z: B = None self.w: B = None self.txt = txt class B: def __init__(self, txt: str): self.z: B = None self.q: B = None self.txt = txt f = A("f") g = B("g") e = B("e") i = A("i") a = B("a") h = B("h") c = A("c") f.z = e f.w = e g.z = a g.q = h e.z = g e.q = g i.z = e i.w = h a.z = h a.q = g h.z = e h.q = e c.z = e c.w = e assert g.z.z.z.q.q.txt == "

h"

class A: def __init__(self, txt: str): self.z: B = None self.w: B = None self.txt = txt class B: def __init__(self, txt: str): self.z: B = None self.q: B = None self.txt = txt f = A("f") g = B("g") e = B("e") i = A("i") a = B("a") h = B("h") c = A("c") f.z = e f.w = e g.z = a g.q = h e.z = g e.q = g i.z = e i.w = h a.z = h a.q = g h.z = e h.q = e c.z = e c.w = e assert g.z.z.z.q.q.txt == "h"

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class A: def __init__(self, txt: str): self.y: A = None self.txt = txt class B: def __init__(self, txt: str): self.y: A = None self.txt = txt c = A("c") i = B("i") d = A("d") c.y = d i.y = d d.y = c assert d.y.y.y.txt == "

c"

class A: def __init__(self, txt: str): self.y: A = None self.txt = txt class B: def __init__(self, txt: str): self.y: A = None self.txt = txt c = A("c") i = B("i") d = A("d") c.y = d i.y = d d.y = c assert d.y.y.y.txt == "c"

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class A: def __init__(self, txt: str): self.x: B = None self.y: B = None self.txt = txt class B: def __init__(self, txt: str): self.u: A = None self.txt = txt b = A("b") c = B("c") g = B("g") e = A("e") b.x = g b.y = c c.u = b g.u = b e.x = c e.y = g assert e.y.u.y.u.txt == "

b"

class A: def __init__(self, txt: str): self.x: B = None self.y: B = None self.txt = txt class B: def __init__(self, txt: str): self.u: A = None self.txt = txt b = A("b") c = B("c") g = B("g") e = A("e") b.x = g b.y = c c.u = b g.u = b e.x = c e.y = g assert e.y.u.y.u.txt == "b"

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class A: def __init__(self, txt: str): self.v: B = None self.txt = txt class B: def __init__(self, txt: str): self.s: A = None self.o: A = None self.txt = txt g = A("g") d = B("d") a = A("a") e = A("e") g.v = d d.s = g d.o = g a.v = d e.v = d assert a.v.s.v.txt == "

d"

class A: def __init__(self, txt: str): self.v: B = None self.txt = txt class B: def __init__(self, txt: str): self.s: A = None self.o: A = None self.txt = txt g = A("g") d = B("d") a = A("a") e = A("e") g.v = d d.s = g d.o = g a.v = d e.v = d assert a.v.s.v.txt == "d"

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class A: def __init__(self, txt: str): self.x: B = None self.txt = txt class B: def __init__(self, txt: str): self.q: A = None self.p: A = None self.txt = txt g = A("g") j = B("j") f = B("f") g.x = f j.q = g j.p = g f.q = g f.p = g assert g.x.q.x.txt == "

f"

class A: def __init__(self, txt: str): self.x: B = None self.txt = txt class B: def __init__(self, txt: str): self.q: A = None self.p: A = None self.txt = txt g = A("g") j = B("j") f = B("f") g.x = f j.q = g j.p = g f.q = g f.p = g assert g.x.q.x.txt == "f"

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class A: def __init__(self, txt: str): self.s: B = None self.txt = txt class B: def __init__(self, txt: str): self.u: A = None self.w: A = None self.txt = txt j = A("j") f = B("f") c = A("c") g = B("g") j.s = g f.u = j f.w = j c.s = g g.u = j g.w = j assert c.s.w.s.w.txt == "

j"

class A: def __init__(self, txt: str): self.s: B = None self.txt = txt class B: def __init__(self, txt: str): self.u: A = None self.w: A = None self.txt = txt j = A("j") f = B("f") c = A("c") g = B("g") j.s = g f.u = j f.w = j c.s = g g.u = j g.w = j assert c.s.w.s.w.txt == "j"

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class A: def __init__(self, txt: str): self.t: B = None self.txt = txt class B: def __init__(self, txt: str): self.x: B = None self.p: B = None self.txt = txt d = A("d") g = B("g") i = B("i") d.t = g g.x = i g.p = i i.x = g i.p = g assert g.p.x.p.txt == "

i"

class A: def __init__(self, txt: str): self.t: B = None self.txt = txt class B: def __init__(self, txt: str): self.x: B = None self.p: B = None self.txt = txt d = A("d") g = B("g") i = B("i") d.t = g g.x = i g.p = i i.x = g i.p = g assert g.p.x.p.txt == "i"

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class A: def __init__(self, txt: str): self.r: A = None self.txt = txt class B: def __init__(self, txt: str): self.y: A = None self.txt = txt b = A("b") g = B("g") d = A("d") b.r = d g.y = b d.r = b assert b.r.r.r.txt == "

d"

class A: def __init__(self, txt: str): self.r: A = None self.txt = txt class B: def __init__(self, txt: str): self.y: A = None self.txt = txt b = A("b") g = B("g") d = A("d") b.r = d g.y = b d.r = b assert b.r.r.r.txt == "d"

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class A: def __init__(self, txt: str): self.o: A = None self.txt = txt class B: def __init__(self, txt: str): self.r: A = None self.txt = txt e = A("e") j = B("j") i = A("i") f = A("f") e.o = f j.r = e i.o = e f.o = e assert f.o.o.o.o.txt == "

f"

class A: def __init__(self, txt: str): self.o: A = None self.txt = txt class B: def __init__(self, txt: str): self.r: A = None self.txt = txt e = A("e") j = B("j") i = A("i") f = A("f") e.o = f j.r = e i.o = e f.o = e assert f.o.o.o.o.txt == "f"

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class A: def __init__(self, txt: str): self.u: B = None self.x: A = None self.txt = txt class B: def __init__(self, txt: str): self.y: A = None self.w: B = None self.txt = txt h = A("h") j = B("j") g = A("g") a = B("a") c = A("c") h.u = j h.x = c j.y = c j.w = a g.u = j g.x = h a.y = h a.w = j c.u = j c.x = g assert j.w.w.w.w.txt == "

j"

class A: def __init__(self, txt: str): self.u: B = None self.x: A = None self.txt = txt class B: def __init__(self, txt: str): self.y: A = None self.w: B = None self.txt = txt h = A("h") j = B("j") g = A("g") a = B("a") c = A("c") h.u = j h.x = c j.y = c j.w = a g.u = j g.x = h a.y = h a.w = j c.u = j c.x = g assert j.w.w.w.w.txt == "j"

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class A: def __init__(self, txt: str): self.u: B = None self.s: B = None self.txt = txt class B: def __init__(self, txt: str): self.y: B = None self.r: A = None self.txt = txt j = A("j") i = B("i") c = B("c") d = A("d") j.u = c j.s = c i.y = c i.r = j c.y = i c.r = d d.u = c d.s = i assert d.s.y.y.y.txt == "

c"

class A: def __init__(self, txt: str): self.u: B = None self.s: B = None self.txt = txt class B: def __init__(self, txt: str): self.y: B = None self.r: A = None self.txt = txt j = A("j") i = B("i") c = B("c") d = A("d") j.u = c j.s = c i.y = c i.r = j c.y = i c.r = d d.u = c d.s = i assert d.s.y.y.y.txt == "c"

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class A: def __init__(self, txt: str): self.s: B = None self.txt = txt class B: def __init__(self, txt: str): self.s: B = None self.w: B = None self.txt = txt a = A("a") f = B("f") j = B("j") b = B("b") a.s = b f.s = j f.w = j j.s = b j.w = b b.s = j b.w = j assert a.s.w.s.w.txt == "

j"

class A: def __init__(self, txt: str): self.s: B = None self.txt = txt class B: def __init__(self, txt: str): self.s: B = None self.w: B = None self.txt = txt a = A("a") f = B("f") j = B("j") b = B("b") a.s = b f.s = j f.w = j j.s = b j.w = b b.s = j b.w = j assert a.s.w.s.w.txt == "j"

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class A: def __init__(self, txt: str): self.v: A = None self.o: B = None self.txt = txt class B: def __init__(self, txt: str): self.p: B = None self.txt = txt a = A("a") g = B("g") h = A("h") e = A("e") d = B("d") a.v = e a.o = d g.p = d h.v = a h.o = g e.v = a e.o = g d.p = g assert g.p.p.p.p.txt == "

g"

class A: def __init__(self, txt: str): self.v: A = None self.o: B = None self.txt = txt class B: def __init__(self, txt: str): self.p: B = None self.txt = txt a = A("a") g = B("g") h = A("h") e = A("e") d = B("d") a.v = e a.o = d g.p = d h.v = a h.o = g e.v = a e.o = g d.p = g assert g.p.p.p.p.txt == "g"

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class A: def __init__(self, txt: str): self.v: A = None self.r: A = None self.txt = txt class B: def __init__(self, txt: str): self.o: A = None self.txt = txt b = A("b") e = B("e") a = A("a") f = B("f") j = A("j") b.v = j b.r = j e.o = a a.v = j a.r = j f.o = a j.v = a j.r = a assert b.v.v.r.r.txt == "

a"

class A: def __init__(self, txt: str): self.v: A = None self.r: A = None self.txt = txt class B: def __init__(self, txt: str): self.o: A = None self.txt = txt b = A("b") e = B("e") a = A("a") f = B("f") j = A("j") b.v = j b.r = j e.o = a a.v = j a.r = j f.o = a j.v = a j.r = a assert b.v.v.r.r.txt == "a"

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class A: def __init__(self, txt: str): self.v: A = None self.p: A = None self.txt = txt class B: def __init__(self, txt: str): self.o: A = None self.txt = txt d = A("d") i = B("i") e = A("e") g = B("g") f = A("f") d.v = e d.p = e i.o = d e.v = f e.p = d g.o = f f.v = d f.p = e assert e.v.v.v.p.p.txt == "

e"

class A: def __init__(self, txt: str): self.v: A = None self.p: A = None self.txt = txt class B: def __init__(self, txt: str): self.o: A = None self.txt = txt d = A("d") i = B("i") e = A("e") g = B("g") f = A("f") d.v = e d.p = e i.o = d e.v = f e.p = d g.o = f f.v = d f.p = e assert e.v.v.v.p.p.txt == "e"

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class A: def __init__(self, txt: str): self.s: B = None self.q: B = None self.txt = txt class B: def __init__(self, txt: str): self.u: B = None self.txt = txt d = A("d") c = B("c") a = B("a") h = A("h") j = A("j") i = B("i") d.s = i d.q = a c.u = i a.u = i h.s = i h.q = c j.s = a j.q = i i.u = c assert j.q.u.u.txt == "

i"

class A: def __init__(self, txt: str): self.s: B = None self.q: B = None self.txt = txt class B: def __init__(self, txt: str): self.u: B = None self.txt = txt d = A("d") c = B("c") a = B("a") h = A("h") j = A("j") i = B("i") d.s = i d.q = a c.u = i a.u = i h.s = i h.q = c j.s = a j.q = i i.u = c assert j.q.u.u.txt == "i"

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class A: def __init__(self, txt: str): self.o: A = None self.txt = txt class B: def __init__(self, txt: str): self.x: B = None self.u: A = None self.txt = txt i = A("i") b = B("b") g = A("g") h = B("h") f = A("f") d = B("d") a = A("a") i.o = g b.x = h b.u = i g.o = i h.x = d h.u = i f.o = g d.x = b d.u = g a.o = f assert a.o.o.o.o.o.o.txt == "

g"

class A: def __init__(self, txt: str): self.o: A = None self.txt = txt class B: def __init__(self, txt: str): self.x: B = None self.u: A = None self.txt = txt i = A("i") b = B("b") g = A("g") h = B("h") f = A("f") d = B("d") a = A("a") i.o = g b.x = h b.u = i g.o = i h.x = d h.u = i f.o = g d.x = b d.u = g a.o = f assert a.o.o.o.o.o.o.txt == "g"

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class A: def __init__(self, txt: str): self.v: B = None self.y: B = None self.txt = txt class B: def __init__(self, txt: str): self.q: B = None self.txt = txt g = A("g") c = B("c") a = A("a") i = B("i") g.v = c g.y = c c.q = i a.v = i a.y = c i.q = c assert a.v.q.q.txt == "

i"

class A: def __init__(self, txt: str): self.v: B = None self.y: B = None self.txt = txt class B: def __init__(self, txt: str): self.q: B = None self.txt = txt g = A("g") c = B("c") a = A("a") i = B("i") g.v = c g.y = c c.q = i a.v = i a.y = c i.q = c assert a.v.q.q.txt == "i"

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class A: def __init__(self, txt: str): self.y: A = None self.txt = txt class B: def __init__(self, txt: str): self.z: A = None self.o: B = None self.txt = txt e = A("e") g = B("g") c = B("c") i = A("i") j = A("j") d = B("d") b = A("b") e.y = j g.z = b g.o = d c.z = i c.o = d i.y = e j.y = i d.z = e d.o = c b.y = j assert b.y.y.y.y.y.y.txt == "

e"

class A: def __init__(self, txt: str): self.y: A = None self.txt = txt class B: def __init__(self, txt: str): self.z: A = None self.o: B = None self.txt = txt e = A("e") g = B("g") c = B("c") i = A("i") j = A("j") d = B("d") b = A("b") e.y = j g.z = b g.o = d c.z = i c.o = d i.y = e j.y = i d.z = e d.o = c b.y = j assert b.y.y.y.y.y.y.txt == "e"

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class A: def __init__(self, txt: str): self.y: B = None self.u: B = None self.txt = txt class B: def __init__(self, txt: str): self.q: A = None self.u: A = None self.txt = txt i = A("i") d = B("d") h = B("h") i.y = d i.u = h d.q = i d.u = i h.q = i h.u = i assert i.y.q.u.txt == "

h"

class A: def __init__(self, txt: str): self.y: B = None self.u: B = None self.txt = txt class B: def __init__(self, txt: str): self.q: A = None self.u: A = None self.txt = txt i = A("i") d = B("d") h = B("h") i.y = d i.u = h d.q = i d.u = i h.q = i h.u = i assert i.y.q.u.txt == "h"

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class A: def __init__(self, txt: str): self.r: A = None self.txt = txt class B: def __init__(self, txt: str): self.x: A = None self.txt = txt a = A("a") d = B("d") g = B("g") i = A("i") a.r = i d.x = i g.x = i i.r = a assert a.r.r.r.r.txt == "

a"

class A: def __init__(self, txt: str): self.r: A = None self.txt = txt class B: def __init__(self, txt: str): self.x: A = None self.txt = txt a = A("a") d = B("d") g = B("g") i = A("i") a.r = i d.x = i g.x = i i.r = a assert a.r.r.r.r.txt == "a"

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class A: def __init__(self, txt: str): self.r: A = None self.txt = txt class B: def __init__(self, txt: str): self.s: B = None self.txt = txt b = A("b") i = B("i") h = A("h") a = B("a") e = B("e") b.r = h i.s = e h.r = b a.s = e e.s = i assert h.r.r.r.r.r.txt == "

b"

class A: def __init__(self, txt: str): self.r: A = None self.txt = txt class B: def __init__(self, txt: str): self.s: B = None self.txt = txt b = A("b") i = B("i") h = A("h") a = B("a") e = B("e") b.r = h i.s = e h.r = b a.s = e e.s = i assert h.r.r.r.r.r.txt == "b"

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class A: def __init__(self, txt: str): self.o: A = None self.u: B = None self.txt = txt class B: def __init__(self, txt: str): self.r: B = None self.t: B = None self.txt = txt c = A("c") b = B("b") e = B("e") i = A("i") c.o = i c.u = e b.r = e b.t = e e.r = b e.t = b i.o = c i.u = b assert i.u.t.t.t.txt == "

e"

class A: def __init__(self, txt: str): self.o: A = None self.u: B = None self.txt = txt class B: def __init__(self, txt: str): self.r: B = None self.t: B = None self.txt = txt c = A("c") b = B("b") e = B("e") i = A("i") c.o = i c.u = e b.r = e b.t = e e.r = b e.t = b i.o = c i.u = b assert i.u.t.t.t.txt == "e"

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class A: def __init__(self, txt: str): self.q: A = None self.txt = txt class B: def __init__(self, txt: str): self.t: B = None self.txt = txt e = A("e") d = B("d") c = B("c") f = A("f") i = B("i") b = B("b") e.q = f d.t = b c.t = i f.q = e i.t = b b.t = c assert e.q.q.q.q.q.q.txt == "

e"

class A: def __init__(self, txt: str): self.q: A = None self.txt = txt class B: def __init__(self, txt: str): self.t: B = None self.txt = txt e = A("e") d = B("d") c = B("c") f = A("f") i = B("i") b = B("b") e.q = f d.t = b c.t = i f.q = e i.t = b b.t = c assert e.q.q.q.q.q.q.txt == "e"

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class A: def __init__(self, txt: str): self.o: B = None self.v: B = None self.txt = txt class B: def __init__(self, txt: str): self.x: A = None self.w: A = None self.txt = txt i = A("i") g = B("g") e = B("e") i.o = e i.v = e g.x = i g.w = i e.x = i e.w = i assert e.x.o.x.txt == "

i"

class A: def __init__(self, txt: str): self.o: B = None self.v: B = None self.txt = txt class B: def __init__(self, txt: str): self.x: A = None self.w: A = None self.txt = txt i = A("i") g = B("g") e = B("e") i.o = e i.v = e g.x = i g.w = i e.x = i e.w = i assert e.x.o.x.txt == "i"

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class A: def __init__(self, txt: str): self.s: B = None self.x: A = None self.txt = txt class B: def __init__(self, txt: str): self.w: A = None self.z: A = None self.txt = txt c = A("c") h = B("h") g = A("g") c.s = h c.x = g h.w = g h.z = g g.s = h g.x = c assert g.x.s.w.txt == "

g"

class A: def __init__(self, txt: str): self.s: B = None self.x: A = None self.txt = txt class B: def __init__(self, txt: str): self.w: A = None self.z: A = None self.txt = txt c = A("c") h = B("h") g = A("g") c.s = h c.x = g h.w = g h.z = g g.s = h g.x = c assert g.x.s.w.txt == "g"

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class A: def __init__(self, txt: str): self.r: B = None self.txt = txt class B: def __init__(self, txt: str): self.v: A = None self.u: A = None self.txt = txt f = A("f") e = B("e") i = B("i") a = B("a") h = A("h") f.r = e e.v = h e.u = f i.v = f i.u = f a.v = h a.u = h h.r = a assert a.u.r.u.txt == "

h"

class A: def __init__(self, txt: str): self.r: B = None self.txt = txt class B: def __init__(self, txt: str): self.v: A = None self.u: A = None self.txt = txt f = A("f") e = B("e") i = B("i") a = B("a") h = A("h") f.r = e e.v = h e.u = f i.v = f i.u = f a.v = h a.u = h h.r = a assert a.u.r.u.txt == "h"

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class A: def __init__(self, txt: str): self.u: A = None self.txt = txt class B: def __init__(self, txt: str): self.z: A = None self.p: A = None self.txt = txt e = A("e") b = B("b") f = B("f") i = A("i") d = B("d") e.u = i b.z = i b.p = i f.z = i f.p = i i.u = e d.z = i d.p = e assert d.p.u.u.txt == "

e"

class A: def __init__(self, txt: str): self.u: A = None self.txt = txt class B: def __init__(self, txt: str): self.z: A = None self.p: A = None self.txt = txt e = A("e") b = B("b") f = B("f") i = A("i") d = B("d") e.u = i b.z = i b.p = i f.z = i f.p = i i.u = e d.z = i d.p = e assert d.p.u.u.txt == "e"

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class A: def __init__(self, txt: str): self.p: B = None self.t: B = None self.txt = txt class B: def __init__(self, txt: str): self.y: B = None self.txt = txt c = A("c") j = B("j") i = B("i") a = A("a") c.p = j c.t = j j.y = i i.y = j a.p = i a.t = i assert a.t.y.y.txt == "

i"

class A: def __init__(self, txt: str): self.p: B = None self.t: B = None self.txt = txt class B: def __init__(self, txt: str): self.y: B = None self.txt = txt c = A("c") j = B("j") i = B("i") a = A("a") c.p = j c.t = j j.y = i i.y = j a.p = i a.t = i assert a.t.y.y.txt == "i"

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class A: def __init__(self, txt: str): self.q: B = None self.txt = txt class B: def __init__(self, txt: str): self.q: A = None self.txt = txt b = A("b") h = B("h") i = B("i") c = B("c") d = B("d") f = B("f") a = A("a") b.q = d h.q = b i.q = a c.q = b d.q = a f.q = b a.q = d assert c.q.q.q.q.q.txt == "

a"

class A: def __init__(self, txt: str): self.q: B = None self.txt = txt class B: def __init__(self, txt: str): self.q: A = None self.txt = txt b = A("b") h = B("h") i = B("i") c = B("c") d = B("d") f = B("f") a = A("a") b.q = d h.q = b i.q = a c.q = b d.q = a f.q = b a.q = d assert c.q.q.q.q.q.txt == "a"

c

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class A: def __init__(self, txt: str): self.r: A = None self.txt = txt class B: def __init__(self, txt: str): self.s: B = None self.txt = txt g = A("g") d = B("d") i = B("i") c = B("c") j = B("j") b = A("b") h = B("h") g.r = b d.s = j i.s = j c.s = d j.s = i b.r = g h.s = i assert b.r.r.r.r.txt == "

b"

class A: def __init__(self, txt: str): self.r: A = None self.txt = txt class B: def __init__(self, txt: str): self.s: B = None self.txt = txt g = A("g") d = B("d") i = B("i") c = B("c") j = B("j") b = A("b") h = B("h") g.r = b d.s = j i.s = j c.s = d j.s = i b.r = g h.s = i assert b.r.r.r.r.txt == "b"

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class A: def __init__(self, txt: str): self.z: B = None self.txt = txt class B: def __init__(self, txt: str): self.y: B = None self.o: A = None self.txt = txt f = A("f") j = B("j") a = B("a") f.z = a j.y = a j.o = f a.y = j a.o = f assert j.o.z.o.txt == "

f"

class A: def __init__(self, txt: str): self.z: B = None self.txt = txt class B: def __init__(self, txt: str): self.y: B = None self.o: A = None self.txt = txt f = A("f") j = B("j") a = B("a") f.z = a j.y = a j.o = f a.y = j a.o = f assert j.o.z.o.txt == "f"

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class A: def __init__(self, txt: str): self.p: B = None self.x: B = None self.txt = txt class B: def __init__(self, txt: str): self.y: A = None self.txt = txt h = A("h") b = B("b") i = B("i") h.p = i h.x = b b.y = h i.y = h assert h.p.y.x.txt == "

b"

class A: def __init__(self, txt: str): self.p: B = None self.x: B = None self.txt = txt class B: def __init__(self, txt: str): self.y: A = None self.txt = txt h = A("h") b = B("b") i = B("i") h.p = i h.x = b b.y = h i.y = h assert h.p.y.x.txt == "b"

h

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class A: def __init__(self, txt: str): self.q: B = None self.txt = txt class B: def __init__(self, txt: str): self.w: B = None self.txt = txt g = A("g") b = B("b") a = B("a") g.q = b b.w = a a.w = b assert g.q.w.w.txt == "

b"

class A: def __init__(self, txt: str): self.q: B = None self.txt = txt class B: def __init__(self, txt: str): self.w: B = None self.txt = txt g = A("g") b = B("b") a = B("a") g.q = b b.w = a a.w = b assert g.q.w.w.txt == "b"

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class A: def __init__(self, txt: str): self.o: A = None self.y: A = None self.txt = txt class B: def __init__(self, txt: str): self.u: B = None self.txt = txt i = A("i") e = B("e") b = B("b") j = A("j") i.o = j i.y = j e.u = b b.u = e j.o = i j.y = i assert j.y.o.y.txt == "

i"

class A: def __init__(self, txt: str): self.o: A = None self.y: A = None self.txt = txt class B: def __init__(self, txt: str): self.u: B = None self.txt = txt i = A("i") e = B("e") b = B("b") j = A("j") i.o = j i.y = j e.u = b b.u = e j.o = i j.y = i assert j.y.o.y.txt == "i"

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class A: def __init__(self, txt: str): self.x: A = None self.o: A = None self.txt = txt class B: def __init__(self, txt: str): self.u: B = None self.txt = txt b = A("b") e = B("e") g = B("g") f = A("f") b.x = f b.o = f e.u = g g.u = e f.x = b f.o = b assert f.x.x.o.txt == "

b"

class A: def __init__(self, txt: str): self.x: A = None self.o: A = None self.txt = txt class B: def __init__(self, txt: str): self.u: B = None self.txt = txt b = A("b") e = B("e") g = B("g") f = A("f") b.x = f b.o = f e.u = g g.u = e f.x = b f.o = b assert f.x.x.o.txt == "b"

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class A: def __init__(self, txt: str): self.p: B = None self.s: A = None self.txt = txt class B: def __init__(self, txt: str): self.t: B = None self.u: A = None self.txt = txt f = A("f") d = B("d") e = A("e") b = B("b") g = A("g") c = A("c") f.p = d f.s = e d.t = b d.u = c e.p = d e.s = c b.t = d b.u = f g.p = b g.s = c c.p = d c.s = f assert d.t.t.t.u.s.s.txt == "

c"

class A: def __init__(self, txt: str): self.p: B = None self.s: A = None self.txt = txt class B: def __init__(self, txt: str): self.t: B = None self.u: A = None self.txt = txt f = A("f") d = B("d") e = A("e") b = B("b") g = A("g") c = A("c") f.p = d f.s = e d.t = b d.u = c e.p = d e.s = c b.t = d b.u = f g.p = b g.s = c c.p = d c.s = f assert d.t.t.t.u.s.s.txt == "c"

d

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class A: def __init__(self, txt: str): self.r: B = None self.txt = txt class B: def __init__(self, txt: str): self.s: A = None self.txt = txt h = A("h") f = B("f") b = A("b") h.r = f f.s = b b.r = f assert h.r.s.r.txt == "

f"

class A: def __init__(self, txt: str): self.r: B = None self.txt = txt class B: def __init__(self, txt: str): self.s: A = None self.txt = txt h = A("h") f = B("f") b = A("b") h.r = f f.s = b b.r = f assert h.r.s.r.txt == "f"

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class A: def __init__(self, txt: str): self.u: A = None self.txt = txt class B: def __init__(self, txt: str): self.w: A = None self.txt = txt c = A("c") f = B("f") a = A("a") j = B("j") e = B("e") g = B("g") c.u = a f.w = c a.u = c j.w = a e.w = a g.w = a assert g.w.u.u.txt == "

a"

class A: def __init__(self, txt: str): self.u: A = None self.txt = txt class B: def __init__(self, txt: str): self.w: A = None self.txt = txt c = A("c") f = B("f") a = A("a") j = B("j") e = B("e") g = B("g") c.u = a f.w = c a.u = c j.w = a e.w = a g.w = a assert g.w.u.u.txt == "a"

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class A: def __init__(self, txt: str): self.o: A = None self.x: A = None self.txt = txt class B: def __init__(self, txt: str): self.u: B = None self.txt = txt e = A("e") g = B("g") i = B("i") a = A("a") d = A("d") j = B("j") h = A("h") e.o = a e.x = h g.u = i i.u = j a.o = d a.x = d d.o = e d.x = a j.u = i h.o = e h.x = d assert g.u.u.u.u.u.u.u.txt == "

i"

class A: def __init__(self, txt: str): self.o: A = None self.x: A = None self.txt = txt class B: def __init__(self, txt: str): self.u: B = None self.txt = txt e = A("e") g = B("g") i = B("i") a = A("a") d = A("d") j = B("j") h = A("h") e.o = a e.x = h g.u = i i.u = j a.o = d a.x = d d.o = e d.x = a j.u = i h.o = e h.x = d assert g.u.u.u.u.u.u.u.txt == "i"

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class A: def __init__(self, txt: str): self.x: B = None self.o: A = None self.txt = txt class B: def __init__(self, txt: str): self.r: A = None self.w: B = None self.txt = txt g = A("g") e = B("e") i = A("i") f = A("f") j = A("j") a = B("a") g.x = a g.o = j e.r = i e.w = a i.x = e i.o = g f.x = a f.o = j j.x = a j.o = f a.r = f a.w = e assert f.o.x.w.w.txt == "

a"

class A: def __init__(self, txt: str): self.x: B = None self.o: A = None self.txt = txt class B: def __init__(self, txt: str): self.r: A = None self.w: B = None self.txt = txt g = A("g") e = B("e") i = A("i") f = A("f") j = A("j") a = B("a") g.x = a g.o = j e.r = i e.w = a i.x = e i.o = g f.x = a f.o = j j.x = a j.o = f a.r = f a.w = e assert f.o.x.w.w.txt == "a"

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class A: def __init__(self, txt: str): self.r: B = None self.x: B = None self.txt = txt class B: def __init__(self, txt: str): self.o: B = None self.x: A = None self.txt = txt g = A("g") i = B("i") j = A("j") f = B("f") h = A("h") g.r = f g.x = f i.o = f i.x = g j.r = i j.x = f f.o = i f.x = g h.r = i h.x = f assert j.r.x.r.txt == "

f"

class A: def __init__(self, txt: str): self.r: B = None self.x: B = None self.txt = txt class B: def __init__(self, txt: str): self.o: B = None self.x: A = None self.txt = txt g = A("g") i = B("i") j = A("j") f = B("f") h = A("h") g.r = f g.x = f i.o = f i.x = g j.r = i j.x = f f.o = i f.x = g h.r = i h.x = f assert j.r.x.r.txt == "f"

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class A: def __init__(self, txt: str): self.v: A = None self.t: B = None self.txt = txt class B: def __init__(self, txt: str): self.p: B = None self.y: A = None self.txt = txt c = A("c") i = B("i") a = A("a") j = A("j") e = B("e") d = A("d") c.v = j c.t = e i.p = e i.y = c a.v = j a.t = e j.v = a j.t = e e.p = i e.y = c d.v = j d.t = i assert c.t.y.v.txt == "

j"

class A: def __init__(self, txt: str): self.v: A = None self.t: B = None self.txt = txt class B: def __init__(self, txt: str): self.p: B = None self.y: A = None self.txt = txt c = A("c") i = B("i") a = A("a") j = A("j") e = B("e") d = A("d") c.v = j c.t = e i.p = e i.y = c a.v = j a.t = e j.v = a j.t = e e.p = i e.y = c d.v = j d.t = i assert c.t.y.v.txt == "j"

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class A: def __init__(self, txt: str): self.q: B = None self.o: A = None self.txt = txt class B: def __init__(self, txt: str): self.p: B = None self.s: A = None self.txt = txt i = A("i") f = B("f") b = B("b") j = B("j") c = B("c") d = A("d") i.q = c i.o = d f.p = b f.s = i b.p = j b.s = d j.p = b j.s = d c.p = j c.s = d d.q = j d.o = i assert c.s.q.p.p.p.txt == "

b"

class A: def __init__(self, txt: str): self.q: B = None self.o: A = None self.txt = txt class B: def __init__(self, txt: str): self.p: B = None self.s: A = None self.txt = txt i = A("i") f = B("f") b = B("b") j = B("j") c = B("c") d = A("d") i.q = c i.o = d f.p = b f.s = i b.p = j b.s = d j.p = b j.s = d c.p = j c.s = d d.q = j d.o = i assert c.s.q.p.p.p.txt == "b"

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class A: def __init__(self, txt: str): self.r: A = None self.txt = txt class B: def __init__(self, txt: str): self.t: A = None self.txt = txt b = A("b") a = B("a") d = B("d") h = A("h") b.r = h a.t = b d.t = h h.r = b assert b.r.r.r.txt == "

h"

class A: def __init__(self, txt: str): self.r: A = None self.txt = txt class B: def __init__(self, txt: str): self.t: A = None self.txt = txt b = A("b") a = B("a") d = B("d") h = A("h") b.r = h a.t = b d.t = h h.r = b assert b.r.r.r.txt == "h"

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class A: def __init__(self, txt: str): self.o: A = None self.txt = txt class B: def __init__(self, txt: str): self.o: B = None self.v: A = None self.txt = txt d = A("d") e = B("e") i = B("i") f = A("f") d.o = f e.o = i e.v = d i.o = e i.v = f f.o = d assert f.o.o.o.txt == "

d"

class A: def __init__(self, txt: str): self.o: A = None self.txt = txt class B: def __init__(self, txt: str): self.o: B = None self.v: A = None self.txt = txt d = A("d") e = B("e") i = B("i") f = A("f") d.o = f e.o = i e.v = d i.o = e i.v = f f.o = d assert f.o.o.o.txt == "d"

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class A: def __init__(self, txt: str): self.s: B = None self.w: B = None self.txt = txt class B: def __init__(self, txt: str): self.s: B = None self.u: B = None self.txt = txt h = A("h") j = B("j") b = A("b") e = B("e") f = A("f") i = B("i") h.s = j h.w = i j.s = e j.u = e b.s = e b.w = i e.s = j e.u = i f.s = e f.w = i i.s = e i.u = j assert j.u.u.u.s.s.txt == "

j"

class A: def __init__(self, txt: str): self.s: B = None self.w: B = None self.txt = txt class B: def __init__(self, txt: str): self.s: B = None self.u: B = None self.txt = txt h = A("h") j = B("j") b = A("b") e = B("e") f = A("f") i = B("i") h.s = j h.w = i j.s = e j.u = e b.s = e b.w = i e.s = j e.u = i f.s = e f.w = i i.s = e i.u = j assert j.u.u.u.s.s.txt == "j"

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class A: def __init__(self, txt: str): self.x: A = None self.txt = txt class B: def __init__(self, txt: str): self.w: B = None self.txt = txt a = A("a") h = B("h") f = B("f") b = A("b") e = B("e") i = A("i") g = A("g") a.x = g h.w = f f.w = h b.x = i e.w = f i.x = g g.x = b assert f.w.w.w.w.w.txt == "

h"

class A: def __init__(self, txt: str): self.x: A = None self.txt = txt class B: def __init__(self, txt: str): self.w: B = None self.txt = txt a = A("a") h = B("h") f = B("f") b = A("b") e = B("e") i = A("i") g = A("g") a.x = g h.w = f f.w = h b.x = i e.w = f i.x = g g.x = b assert f.w.w.w.w.w.txt == "h"

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class A: def __init__(self, txt: str): self.w: B = None self.t: A = None self.txt = txt class B: def __init__(self, txt: str): self.t: A = None self.s: B = None self.txt = txt b = A("b") e = B("e") h = B("h") a = B("a") g = A("g") b.w = e b.t = g e.t = b e.s = h h.t = g h.s = e a.t = b a.s = e g.w = h g.t = b assert h.s.s.t.txt == "

g"

class A: def __init__(self, txt: str): self.w: B = None self.t: A = None self.txt = txt class B: def __init__(self, txt: str): self.t: A = None self.s: B = None self.txt = txt b = A("b") e = B("e") h = B("h") a = B("a") g = A("g") b.w = e b.t = g e.t = b e.s = h h.t = g h.s = e a.t = b a.s = e g.w = h g.t = b assert h.s.s.t.txt == "g"

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class A: def __init__(self, txt: str): self.s: B = None self.txt = txt class B: def __init__(self, txt: str): self.u: B = None self.txt = txt b = A("b") d = B("d") g = A("g") h = A("h") e = A("e") c = B("c") f = B("f") b.s = d d.u = f g.s = d h.s = f e.s = d c.u = f f.u = c assert h.s.u.u.u.u.txt == "

f"

class A: def __init__(self, txt: str): self.s: B = None self.txt = txt class B: def __init__(self, txt: str): self.u: B = None self.txt = txt b = A("b") d = B("d") g = A("g") h = A("h") e = A("e") c = B("c") f = B("f") b.s = d d.u = f g.s = d h.s = f e.s = d c.u = f f.u = c assert h.s.u.u.u.u.txt == "f"

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class A: def __init__(self, txt: str): self.y: B = None self.txt = txt class B: def __init__(self, txt: str): self.w: B = None self.txt = txt j = A("j") d = B("d") i = A("i") g = B("g") j.y = g d.w = g i.y = d g.w = d assert i.y.w.w.txt == "

d"

class A: def __init__(self, txt: str): self.y: B = None self.txt = txt class B: def __init__(self, txt: str): self.w: B = None self.txt = txt j = A("j") d = B("d") i = A("i") g = B("g") j.y = g d.w = g i.y = d g.w = d assert i.y.w.w.txt == "d"

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class A: def __init__(self, txt: str): self.q: A = None self.z: B = None self.txt = txt class B: def __init__(self, txt: str): self.p: A = None self.q: B = None self.txt = txt d = A("d") b = B("b") f = A("f") h = A("h") e = B("e") d.q = f d.z = e b.p = f b.q = e f.q = h f.z = e h.q = f h.z = b e.p = h e.q = b assert f.q.z.p.z.txt == "

e"

class A: def __init__(self, txt: str): self.q: A = None self.z: B = None self.txt = txt class B: def __init__(self, txt: str): self.p: A = None self.q: B = None self.txt = txt d = A("d") b = B("b") f = A("f") h = A("h") e = B("e") d.q = f d.z = e b.p = f b.q = e f.q = h f.z = e h.q = f h.z = b e.p = h e.q = b assert f.q.z.p.z.txt == "e"

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class A: def __init__(self, txt: str): self.w: A = None self.txt = txt class B: def __init__(self, txt: str): self.z: A = None self.p: A = None self.txt = txt g = A("g") d = B("d") f = B("f") a = A("a") b = A("b") i = B("i") g.w = b d.z = g d.p = a f.z = a f.p = b a.w = b b.w = g i.z = b i.p = b assert i.p.w.w.txt == "

b"

class A: def __init__(self, txt: str): self.w: A = None self.txt = txt class B: def __init__(self, txt: str): self.z: A = None self.p: A = None self.txt = txt g = A("g") d = B("d") f = B("f") a = A("a") b = A("b") i = B("i") g.w = b d.z = g d.p = a f.z = a f.p = b a.w = b b.w = g i.z = b i.p = b assert i.p.w.w.txt == "b"

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class A: def __init__(self, txt: str): self.p: B = None self.q: B = None self.txt = txt class B: def __init__(self, txt: str): self.u: B = None self.txt = txt d = A("d") g = B("g") c = A("c") e = A("e") i = B("i") h = B("h") b = A("b") d.p = h d.q = h g.u = i c.p = h c.q = g e.p = g e.q = g i.u = h h.u = i b.p = i b.q = h assert c.q.u.u.txt == "

h"

class A: def __init__(self, txt: str): self.p: B = None self.q: B = None self.txt = txt class B: def __init__(self, txt: str): self.u: B = None self.txt = txt d = A("d") g = B("g") c = A("c") e = A("e") i = B("i") h = B("h") b = A("b") d.p = h d.q = h g.u = i c.p = h c.q = g e.p = g e.q = g i.u = h h.u = i b.p = i b.q = h assert c.q.u.u.txt == "h"

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class A: def __init__(self, txt: str): self.z: B = None self.txt = txt class B: def __init__(self, txt: str): self.x: A = None self.txt = txt f = A("f") i = B("i") d = B("d") f.z = d i.x = f d.x = f assert d.x.z.x.txt == "

f"

class A: def __init__(self, txt: str): self.z: B = None self.txt = txt class B: def __init__(self, txt: str): self.x: A = None self.txt = txt f = A("f") i = B("i") d = B("d") f.z = d i.x = f d.x = f assert d.x.z.x.txt == "f"

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class A: def __init__(self, txt: str): self.z: B = None self.txt = txt class B: def __init__(self, txt: str): self.s: B = None self.u: B = None self.txt = txt i = A("i") f = B("f") j = B("j") d = A("d") i.z = j f.s = j f.u = j j.s = f j.u = f d.z = f assert f.s.u.s.txt == "

j"

class A: def __init__(self, txt: str): self.z: B = None self.txt = txt class B: def __init__(self, txt: str): self.s: B = None self.u: B = None self.txt = txt i = A("i") f = B("f") j = B("j") d = A("d") i.z = j f.s = j f.u = j j.s = f j.u = f d.z = f assert f.s.u.s.txt == "j"

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class A: def __init__(self, txt: str): self.o: B = None self.y: B = None self.txt = txt class B: def __init__(self, txt: str): self.u: A = None self.txt = txt i = A("i") j = B("j") h = A("h") e = B("e") d = A("d") b = A("b") a = B("a") i.o = a i.y = j j.u = b h.o = e h.y = e e.u = b d.o = a d.y = j b.o = e b.y = a a.u = i assert b.y.u.y.u.y.u.txt == "

i"

class A: def __init__(self, txt: str): self.o: B = None self.y: B = None self.txt = txt class B: def __init__(self, txt: str): self.u: A = None self.txt = txt i = A("i") j = B("j") h = A("h") e = B("e") d = A("d") b = A("b") a = B("a") i.o = a i.y = j j.u = b h.o = e h.y = e e.u = b d.o = a d.y = j b.o = e b.y = a a.u = i assert b.y.u.y.u.y.u.txt == "i"

b

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class A: def __init__(self, txt: str): self.z: B = None self.txt = txt class B: def __init__(self, txt: str): self.y: A = None self.txt = txt d = A("d") c = B("c") g = B("g") d.z = c c.y = d g.y = d assert g.y.z.y.txt == "

d"

class A: def __init__(self, txt: str): self.z: B = None self.txt = txt class B: def __init__(self, txt: str): self.y: A = None self.txt = txt d = A("d") c = B("c") g = B("g") d.z = c c.y = d g.y = d assert g.y.z.y.txt == "d"

g

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class A: def __init__(self, txt: str): self.u: A = None self.v: A = None self.txt = txt class B: def __init__(self, txt: str): self.q: A = None self.o: B = None self.txt = txt e = A("e") a = B("a") i = B("i") h = A("h") e.u = h e.v = h a.q = h a.o = i i.q = e i.o = a h.u = e h.v = e assert a.q.v.u.u.txt == "

e"

class A: def __init__(self, txt: str): self.u: A = None self.v: A = None self.txt = txt class B: def __init__(self, txt: str): self.q: A = None self.o: B = None self.txt = txt e = A("e") a = B("a") i = B("i") h = A("h") e.u = h e.v = h a.q = h a.o = i i.q = e i.o = a h.u = e h.v = e assert a.q.v.u.u.txt == "e"

a

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class A: def __init__(self, txt: str): self.t: B = None self.txt = txt class B: def __init__(self, txt: str): self.y: A = None self.txt = txt i = A("i") e = B("e") f = A("f") a = B("a") b = B("b") i.t = a e.y = f f.t = b a.y = f b.y = f assert f.t.y.t.y.t.txt == "

b"

class A: def __init__(self, txt: str): self.t: B = None self.txt = txt class B: def __init__(self, txt: str): self.y: A = None self.txt = txt i = A("i") e = B("e") f = A("f") a = B("a") b = B("b") i.t = a e.y = f f.t = b a.y = f b.y = f assert f.t.y.t.y.t.txt == "b"

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class A: def __init__(self, txt: str): self.p: B = None self.t: A = None self.txt = txt class B: def __init__(self, txt: str): self.z: A = None self.txt = txt a = A("a") f = B("f") d = A("d") c = A("c") e = B("e") g = B("g") b = B("b") a.p = f a.t = c f.z = a d.p = g d.t = c c.p = f c.t = d e.z = d g.z = d b.z = c assert g.z.p.z.t.t.p.txt == "

g"

class A: def __init__(self, txt: str): self.p: B = None self.t: A = None self.txt = txt class B: def __init__(self, txt: str): self.z: A = None self.txt = txt a = A("a") f = B("f") d = A("d") c = A("c") e = B("e") g = B("g") b = B("b") a.p = f a.t = c f.z = a d.p = g d.t = c c.p = f c.t = d e.z = d g.z = d b.z = c assert g.z.p.z.t.t.p.txt == "g"

g

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class A: def __init__(self, txt: str): self.s: A = None self.p: A = None self.txt = txt class B: def __init__(self, txt: str): self.s: B = None self.txt = txt j = A("j") i = B("i") d = B("d") b = B("b") c = A("c") h = B("h") e = A("e") j.s = e j.p = c i.s = b d.s = h b.s = h c.s = e c.p = j h.s = i e.s = j e.p = c assert d.s.s.s.s.s.s.s.txt == "

h"

class A: def __init__(self, txt: str): self.s: A = None self.p: A = None self.txt = txt class B: def __init__(self, txt: str): self.s: B = None self.txt = txt j = A("j") i = B("i") d = B("d") b = B("b") c = A("c") h = B("h") e = A("e") j.s = e j.p = c i.s = b d.s = h b.s = h c.s = e c.p = j h.s = i e.s = j e.p = c assert d.s.s.s.s.s.s.s.txt == "h"

d

h

i

b

h

i

b

h

h

b

i

h

b

i

h

d

class A: def __init__(self, txt: str): self.v: B = None self.z: A = None self.txt = txt class B: def __init__(self, txt: str): self.w: B = None self.v: B = None self.txt = txt i = A("i") e = B("e") d = A("d") c = B("c") h = B("h") i.v = e i.z = d e.w = c e.v = c d.v = c d.z = i c.w = h c.v = e h.w = c h.v = c assert c.v.v.v.v.v.txt == "

e"

class A: def __init__(self, txt: str): self.v: B = None self.z: A = None self.txt = txt class B: def __init__(self, txt: str): self.w: B = None self.v: B = None self.txt = txt i = A("i") e = B("e") d = A("d") c = B("c") h = B("h") i.v = e i.z = d e.w = c e.v = c d.v = c d.z = i c.w = h c.v = e h.w = c h.v = c assert c.v.v.v.v.v.txt == "e"

c

e

c

e

c

e

x

x

e

c

e

c

e

c

x

x

class A: def __init__(self, txt: str): self.o: A = None self.txt = txt class B: def __init__(self, txt: str): self.v: A = None self.o: B = None self.txt = txt h = A("h") g = B("g") a = B("a") c = A("c") i = B("i") e = B("e") d = B("d") h.o = c g.v = h g.o = d a.v = h a.o = e c.o = h i.v = c i.o = g e.v = c e.o = i d.v = c d.o = i assert h.o.o.o.txt == "

c"

class A: def __init__(self, txt: str): self.o: A = None self.txt = txt class B: def __init__(self, txt: str): self.v: A = None self.o: B = None self.txt = txt h = A("h") g = B("g") a = B("a") c = A("c") i = B("i") e = B("e") d = B("d") h.o = c g.v = h g.o = d a.v = h a.o = e c.o = h i.v = c i.o = g e.v = c e.o = i d.v = c d.o = i assert h.o.o.o.txt == "c"

h

c

h

c

x

x

x

x

c

h

c

h

x

x

x

x

class A: def __init__(self, txt: str): self.t: A = None self.y: A = None self.txt = txt class B: def __init__(self, txt: str): self.u: A = None self.txt = txt g = A("g") c = B("c") a = A("a") g.t = a g.y = a c.u = a a.t = g a.y = g assert a.t.y.t.txt == "

g"

class A: def __init__(self, txt: str): self.t: A = None self.y: A = None self.txt = txt class B: def __init__(self, txt: str): self.u: A = None self.txt = txt g = A("g") c = B("c") a = A("a") g.t = a g.y = a c.u = a a.t = g a.y = g assert a.t.y.t.txt == "g"

a

g

a

g

x

x

x

x

g

a

g

a

x

x

x

x

class A: def __init__(self, txt: str): self.y: A = None self.r: B = None self.txt = txt class B: def __init__(self, txt: str): self.u: B = None self.y: B = None self.txt = txt d = A("d") c = B("c") a = A("a") i = A("i") j = B("j") g = B("g") b = B("b") d.y = i d.r = b c.u = g c.y = g a.y = i a.r = j i.y = a i.r = g j.u = g j.y = c g.u = b g.y = b b.u = j b.y = c assert a.r.y.u.txt == "

g"

class A: def __init__(self, txt: str): self.y: A = None self.r: B = None self.txt = txt class B: def __init__(self, txt: str): self.u: B = None self.y: B = None self.txt = txt d = A("d") c = B("c") a = A("a") i = A("i") j = B("j") g = B("g") b = B("b") d.y = i d.r = b c.u = g c.y = g a.y = i a.r = j i.y = a i.r = g j.u = g j.y = c g.u = b g.y = b b.u = j b.y = c assert a.r.y.u.txt == "g"

a

j

c

g

x

x

x

x

g

c

j

a

x

x

x

x

class A: def __init__(self, txt: str): self.v: B = None self.txt = txt class B: def __init__(self, txt: str): self.w: A = None self.y: B = None self.txt = txt f = A("f") h = B("h") j = A("j") e = B("e") b = A("b") d = A("d") a = A("a") f.v = e h.w = d h.y = e j.v = e e.w = b e.y = h b.v = h d.v = h a.v = h assert d.v.w.v.w.txt == "

d"

class A: def __init__(self, txt: str): self.v: B = None self.txt = txt class B: def __init__(self, txt: str): self.w: A = None self.y: B = None self.txt = txt f = A("f") h = B("h") j = A("j") e = B("e") b = A("b") d = A("d") a = A("a") f.v = e h.w = d h.y = e j.v = e e.w = b e.y = h b.v = h d.v = h a.v = h assert d.v.w.v.w.txt == "d"

d

h

d

h

d

x

x

x

d

h

d

h

d

x

x

x

class A: def __init__(self, txt: str): self.o: B = None self.v: A = None self.txt = txt class B: def __init__(self, txt: str): self.q: A = None self.txt = txt i = A("i") j = B("j") h = B("h") d = B("d") b = B("b") g = A("g") e = A("e") i.o = b i.v = g j.q = i h.q = i d.q = i b.q = g g.o = h g.v = e e.o = b e.v = i assert g.v.v.v.o.q.txt == "

i"

class A: def __init__(self, txt: str): self.o: B = None self.v: A = None self.txt = txt class B: def __init__(self, txt: str): self.q: A = None self.txt = txt i = A("i") j = B("j") h = B("h") d = B("d") b = B("b") g = A("g") e = A("e") i.o = b i.v = g j.q = i h.q = i d.q = i b.q = g g.o = h g.v = e e.o = b e.v = i assert g.v.v.v.o.q.txt == "i"

g

e

i

g

h

i

x

x

i

h

g

i

e

g

x

x

class A: def __init__(self, txt: str): self.x: A = None self.o: B = None self.txt = txt class B: def __init__(self, txt: str): self.s: B = None self.txt = txt j = A("j") b = B("b") a = B("a") e = A("e") h = A("h") g = A("g") i = B("i") j.x = g j.o = a b.s = a a.s = b e.x = h e.o = i h.x = e h.o = i g.x = h g.o = b i.s = a assert a.s.s.s.s.s.s.txt == "

a"

class A: def __init__(self, txt: str): self.x: A = None self.o: B = None self.txt = txt class B: def __init__(self, txt: str): self.s: B = None self.txt = txt j = A("j") b = B("b") a = B("a") e = A("e") h = A("h") g = A("g") i = B("i") j.x = g j.o = a b.s = a a.s = b e.x = h e.o = i h.x = e h.o = i g.x = h g.o = b i.s = a assert a.s.s.s.s.s.s.txt == "a"

a

b

a

b

a

b

a

x

a

b

a

b

a

b

a

x

class A: def __init__(self, txt: str): self.q: B = None self.txt = txt class B: def __init__(self, txt: str): self.q: A = None self.txt = txt b = A("b") h = B("h") g = A("g") i = A("i") c = A("c") a = A("a") e = B("e") b.q = e h.q = b g.q = e i.q = h c.q = e a.q = h e.q = b assert c.q.q.q.q.q.txt == "

e"

class A: def __init__(self, txt: str): self.q: B = None self.txt = txt class B: def __init__(self, txt: str): self.q: A = None self.txt = txt b = A("b") h = B("h") g = A("g") i = A("i") c = A("c") a = A("a") e = B("e") b.q = e h.q = b g.q = e i.q = h c.q = e a.q = h e.q = b assert c.q.q.q.q.q.txt == "e"

c

e

b

e

b

e

x

x

e

b

e

b

e

c

x

x

class A: def __init__(self, txt: str): self.z: B = None self.txt = txt class B: def __init__(self, txt: str): self.z: B = None self.txt = txt h = A("h") i = B("i") a = A("a") b = B("b") h.z = i i.z = b a.z = i b.z = i assert i.z.z.z.txt == "

b"

class A: def __init__(self, txt: str): self.z: B = None self.txt = txt class B: def __init__(self, txt: str): self.z: B = None self.txt = txt h = A("h") i = B("i") a = A("a") b = B("b") h.z = i i.z = b a.z = i b.z = i assert i.z.z.z.txt == "b"

i

b

i

b

x

x

x

x

b

i

b

i

x

x

x

x

class A: def __init__(self, txt: str): self.u: A = None self.txt = txt class B: def __init__(self, txt: str): self.z: A = None self.txt = txt f = A("f") e = B("e") i = A("i") f.u = i e.z = f i.u = f assert e.z.u.u.txt == "

f"

class A: def __init__(self, txt: str): self.u: A = None self.txt = txt class B: def __init__(self, txt: str): self.z: A = None self.txt = txt f = A("f") e = B("e") i = A("i") f.u = i e.z = f i.u = f assert e.z.u.u.txt == "f"

e

f

i

f

x

x

x

x

f

i

f

e

x

x

x

x

class A: def __init__(self, txt: str): self.o: B = None self.txt = txt class B: def __init__(self, txt: str): self.v: A = None self.o: B = None self.txt = txt i = A("i") g = B("g") j = A("j") b = A("b") h = B("h") f = B("f") a = B("a") i.o = h g.v = j g.o = f j.o = f b.o = a h.v = j h.o = f f.v = i f.o = g a.v = j a.o = f assert g.v.o.o.txt == "

g"

class A: def __init__(self, txt: str): self.o: B = None self.txt = txt class B: def __init__(self, txt: str): self.v: A = None self.o: B = None self.txt = txt i = A("i") g = B("g") j = A("j") b = A("b") h = B("h") f = B("f") a = B("a") i.o = h g.v = j g.o = f j.o = f b.o = a h.v = j h.o = f f.v = i f.o = g a.v = j a.o = f assert g.v.o.o.txt == "g"

g

j

f

g

x

x

x

x

g

f

j

g

x

x

x

x

class A: def __init__(self, txt: str): self.s: B = None self.txt = txt class B: def __init__(self, txt: str): self.x: A = None self.q: B = None self.txt = txt g = A("g") h = B("h") i = B("i") g.s = h h.x = g h.q = i i.x = g i.q = h assert i.x.s.q.txt == "

i"

class A: def __init__(self, txt: str): self.s: B = None self.txt = txt class B: def __init__(self, txt: str): self.x: A = None self.q: B = None self.txt = txt g = A("g") h = B("h") i = B("i") g.s = h h.x = g h.q = i i.x = g i.q = h assert i.x.s.q.txt == "i"

i

g

h

i

x

x

x

x

i

h

g

i

x

x

x

x

class A: def __init__(self, txt: str): self.u: A = None self.x: A = None self.txt = txt class B: def __init__(self, txt: str): self.z: A = None self.txt = txt j = A("j") c = B("c") b = A("b") j.u = b j.x = b c.z = j b.u = j b.x = j assert c.z.x.x.txt == "

j"

class A: def __init__(self, txt: str): self.u: A = None self.x: A = None self.txt = txt class B: def __init__(self, txt: str): self.z: A = None self.txt = txt j = A("j") c = B("c") b = A("b") j.u = b j.x = b c.z = j b.u = j b.x = j assert c.z.x.x.txt == "j"

c

j

b

j

x

x

x

x

j

b

j

c

x

x

x

x

class A: def __init__(self, txt: str): self.x: A = None self.z: B = None self.txt = txt class B: def __init__(self, txt: str): self.r: B = None self.q: B = None self.txt = txt i = A("i") c = B("c") f = B("f") b = A("b") i.x = b i.z = c c.r = f c.q = f f.r = c f.q = c b.x = i b.z = f assert i.x.z.r.txt == "

c"

class A: def __init__(self, txt: str): self.x: A = None self.z: B = None self.txt = txt class B: def __init__(self, txt: str): self.r: B = None self.q: B = None self.txt = txt i = A("i") c = B("c") f = B("f") b = A("b") i.x = b i.z = c c.r = f c.q = f f.r = c f.q = c b.x = i b.z = f assert i.x.z.r.txt == "c"

i

b

f

c

x

x

x

x

c

f

b

i

x

x

x

x

class A: def __init__(self, txt: str): self.p: B = None self.txt = txt class B: def __init__(self, txt: str): self.s: B = None self.txt = txt b = A("b") d = B("d") c = B("c") b.p = d d.s = c c.s = d assert d.s.s.s.txt == "

c"

class A: def __init__(self, txt: str): self.p: B = None self.txt = txt class B: def __init__(self, txt: str): self.s: B = None self.txt = txt b = A("b") d = B("d") c = B("c") b.p = d d.s = c c.s = d assert d.s.s.s.txt == "c"

d

c

d