The Caesar Wheel

The oldest cipher in the book: rotate every letter k steps down the alphabet, wrapping from z back to a. Julius Caesar really used this! 🏛️

You get a lowercase message (letters and spaces; spaces stay) and the shift k. Print the coded message.

Example:

Input: message = "attack at dawn", k = 3 Output: dwwdfn dw gdzq

Shifting each letter 3 steps forward (a→d, t→w, ...) and wrapping z back around to c gives the coded message.