fix

app.py

@@ -94,8 +94,9 @@ if __name__=='__main__':
         for word_id,(col,word) in enumerate(zip(cols[1:-1],decoded_sent[1:-1])):
             with col:
                 if st.button(word,key=f'word_{word_id}'):
-                    st.session_state['masked_pos_1'].append(word_id)
-        st.write(f'Masked words: {" ".join([decoded_sent[word_id+1] for word_id in st.session_state["masked_pos_1"])}')
+                    if word_in not in st.session_state['masked_pos_1']:
+                        st.session_state['masked_pos_1'].append(word_id)
+        st.write(f'Masked words: {", ".join([decoded_sent[word_id+1] for word_id in np.sort(st.session_state["masked_pos_1"])])}')
 
     '''
     sent_1 = st.sidebar.text_input('Sentence 1',value='It is better to play a prank on Samuel than Craig because he gets angry less often.',on_change=clear_data)