import base64, binascii, codecs, pathlib, sys

def solve(s: str) -> str:
    l3 = base64.b64decode(s).decode()            # undo final base64
    l2 = binascii.unhexlify(l3).decode()         # undo hex
    l1 = codecs.decode(l2, 'rot_13')             # undo rot13
    flag = base64.b64decode(l1).decode()         # undo first base64
    return flag

def main():
    path = pathlib.Path("message.txt")
    data = path.read_text().strip()
    flag = solve(data)
    print(flag)

if __name__ == "__main__":
    main()