def rot13(message):
    alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
    subs = {char: alphabet[(i + 13) % 26] for i, char in enumerate(alphabet)}

    return ''.join(list(map(
        lambda x: subs[x] if x in subs else x,
        message
    )))


if __name__ == '__main__':
    with open("./exercises/144/inputs/input") as file:
        input = file.read()

    print(rot13(input))