Ceaser_decoder

scratch.py

en_alphabet = [x for x in range(ord('a'), ord('z') + 1)]
s = input()
whitespace = 'whitespace'
s = s.replace(' ', ' whitespace')
s = s.split(whitespace)

for word in s:
    counter = 0
    for symbol in word:
        if ord(symbol.lower()) in en_alphabet:
            counter = counter + 1

    for symbol in word:
        if ord(symbol.lower()) in en_alphabet:
            if ord(symbol.lower()) + counter in en_alphabet:
                if symbol == symbol.upper() in word:
                    print(chr(ord(symbol.lower()) + counter).upper(), end='')
                else:
                    print(chr(ord(symbol.lower()) + counter), end='')
            else:
                if symbol == symbol.upper() in word:
                    print(chr(ord(symbol.lower()) + counter - len(en_alphabet)).upper(), end='')
                else:
                    print(chr(ord(symbol.lower()) + counter - len(en_alphabet)), end='')
        else:
            print(symbol, end='')