relax the criteria

app.py

@@ -12,6 +12,7 @@ b_base = ["a", "i", "u", "e", "o"]
 b_ext = ["ya", "yo", "yu"]
 
 invalid = ["yi", "ye", "wi", "wu", "we"]
+spec_map = {"cya": "cha", "cyu": "chu", "cyo": "cho"}
 
 
 def next_question(hira, kata, c, quiz_list):
@@ -73,8 +74,22 @@ def combine(a, b):
 
 
 def check(kana: str, roma: str, correct, total):
+    roma = roma.lower()
+
     kana_roma = to_roma(kana)
-    ans_correct = kana_roma == roma.lower()
+    roma_hira = to_hiragana(roma)
+    roma_kata = to_katakana(roma)
+    spec_roma = spec_map.get(roma, roma)
+    spec_hira = to_hiragana(spec_roma)
+    spec_kata = to_katakana(spec_roma)
+
+    c0 = kana_roma == roma
+    c1 = roma_hira == kana
+    c2 = roma_kata == kana
+    c3 = spec_hira == kana
+    c4 = spec_kata == kana
+
+    ans_correct = any((c0, c1, c2, c3, c4))
     correct += ans_correct
     total += 1