with open("3/forstudents/a/ciphertext.bin", "rb") as cipher_file, open(
    "3/forstudents/a/key.bin", "rb"
) as key_file:
    cipher_content = cipher_file.read()
    key_content = key_file.read()
    print(
        ((
            int.from_bytes(cipher_content, "big") ^ int.from_bytes(key_content, "big")
        ).to_bytes(max(len(cipher_content), len(key_content)), "big")).decode()
    )