(Another malleability example). Let us give another example illustrating the malleability of stream ciphers. Suppose you are told that the stream cipher encryption of the message attack at dawn" is 6c73d5240a948c86981bc294814d (the plaintext letters are encoded as 8-bit ASCII and the given ciphertext is written in hex). What would be the stream cipher encryption of the message attack at dusk" under the same key?