If n = 64, and John sends 2 plaintext messages, m₁ of size 100 bits and m₂ of size 200 bits to Stacy, what would be the total length of the ciphertext sent from John to Stacy?

Let (Init, Next) be a stream cipher that takes an n-bit IV. Define a private-key encryption scheme for arbitrary-length messages as follows: - Gen: on input 1n, choose a uniform k{0,1}n and output it. - Enc: on input a key k{0,1}n and a message m{0,1}, choose uniform IV{0,1}n, and output the ciphertext IV,GetBits1(Init(k,IV),1m)m. - Dec: on input a key k{0,1}n and a ciphertext IV,c, output the message m:=GetBits1(lnit(k,IV),1c)c