help finish it! need to work without errors! how to ensure that the letters do not repeat?

Question

https://code.sololearn.com/WgA498q5atoJ/?ref=app

Answer 1

You created two copies of this question. Please decide which one you want to keep and remove the other one to help reducing duplicate questions.

https://www.sololearn.com/Discuss/2082044/?ref=app

Hope you understand 👍

Answer 2

I think you just need to be a little more patient. If it makes you feel better, anyone making multiple questions with the same topic will get the same note. It is nothing personal.

Sorry if my note disturbed you : )

Answer 3

Sorry, I repeat the question, because no one helped, only criticizes! If you can, then help, but I just don’t see the point! I hope you understand

Answer 4

I’ve been waiting for a long time and no one has written or corrected or given real advice in the code! Okay, I understand, here no one can help!