KeyCipher

def keyCipher(text, key, alphabet):
    textarr = list(text)
    res = [None] * len(text)
    keytemp = list(key)
    f = len(keytemp)
    change = [None] * f
    for i in range(0, f):
        change[i] = alphabet.index(keytemp[i]) + 1
    j = 0
    for i in range(0, len(text)):
        if j == len(change):
            j = 0
        if (ord(textarr[i]) + change[j]) >= 122:
            res[i] = chr(ord(textarr[i]) + change[j] - 25)
        else:
            res[i] = chr(ord(textarr[i]) + change[j])
        j = j + 1
    return res


def keyDecipher(text, key, alphabet):
    textarr = list(text)
    res = [None] * len(text)
    keytemp = list(key)
    leng = len(keytemp)
    change = [None] * leng
    for i in range(0, leng):
        change[i] = alphabet.index(keytemp[i]) + 1
    j = 0
    for i in range(0, len(text)):
        if j == len(change):
            j = 0
        if (ord(textarr[i]) - change[j]) <= 96:
            res[i] = chr(ord(textarr[i]) - change[j] + 25)
        else:
            res[i] = chr(ord(textarr[i]) - change[j])
        j = j + 1
    return res


alphabet = "abcdefghijklmnopqrstuvwxyz"
print("Enter your message: ")
mes = str(input())
key = "kadfjasdakfas"
mes = mes.lower()
mes = mes.replace(' ', '')
result = ''.join(keyCipher(mes, key, alphabet))
print(result)
resultDecipher = ''.join(keyDecipher(result, key, alphabet))
print(resultDecipher)