i-love-lance-janice.py

def solution(s):
    CYPHER = {
        "a": "z",
        "b": "y",
        "c": "x",
        "d": "w",
        "e": "v",
        "f": "u",
        "g": "t",
        "h": "s",
        "i": "r",
        "j": "q",
        "k": "p",
        "l": "o",
        "m": "n",
        "n": "m",
        "o": "l",
        "p": "k",
        "q": "j",
        "r": "i",
        "s": "h",
        "t": "g",
        "u": "f",
        "v": "e",
        "w": "d",
        "x": "c",
        "y": "b",
        "z": "a",
    }
    s_chars = list(s)

    for i, char in enumerate(s_chars):
        if char in CYPHER:
            s_chars[i] = CYPHER[char]

    return ''.join(s_chars)


print(solution("Yvzs! I xzm'g yvorvev Lzmxv olhg srh qly zg gsv xlolmb!!"))