How to increase the allowed number of input characters?

Question

Python

/del /del /del /del /del /del /del /del /del /del /del /del

Answer 1

Perhaps this is not the final solution, but from our communication in the comments, I made the assumption that the string you have is stored in the form
"abvgdeziyklmnoprostufhtschshshchyyeyuya" then
the essence of the problem:

position =alphabet.find('я') # 31
newPosition = position + key # 36
alphabet [newPosition] # ааааа! нет такой буквы

I assume that you wanted to play the Solomon cipher, in which, when you go over the edge, the count starts again

position =s.find('я') # 31
newPosition = (position + key) % len(alphabet) # 4
alphabet [newPosition] # д

By the way, do not forget that either the alphabet must contain both lowercase and uppercase letters, or before encryption, everything must be reduced to the register in which your dictionary is stored.
And because of what the cipher shift is wrong without a clue: throw off your alphabet.