# Pyth, 7 bytes

    V.zXNGz

[Try it online!](http://pyth.herokuapp.com/?code=V.zXNGz&input=qwertyuiopasdfghjklzxcvbnm%0Ahello%0Abye!%0Ai+don%27t+know.&debug=0)

How it works:

    V.zXNGz
            G = "abcdefghijklmnopqrstuvwxyz"
            z = input()
    V.z     for N in all_input():
       XNGz     N.translate(G,z)    <--- automatically printed