def decode(binary):
    """Decodes a sequence of binary number strings into a list of numbers."""
    decoded = []
    for binary in binary.split():
        number = int(binary, 2)
        decoded.append(number)
    return decoded
    
def decrypt(codes, key):
    """Decrypts a sequence of numbers by applying the XOR operation to each number and the next number in the key."""
    cleartext = ""
    key_index = 0
    for code in codes:
        key_code = ord(key[key_index])
        # Decrypt: combine one number in the ciphertext and the key using XOR.
        plaintext = code ^ key_code
        cleartext += chr(plaintext)
        # Take the next character in the key, wrapping around to 0 if we reach the key's end.
        key_index = (key_index + 1) % len(key)
    return cleartext
        
print(decrypt(decode(ciphertext), "ROMANSHORN"))