Consider a circular alphabet: after the "Z"
it loops back to the "A"
again.
How does the alphabet look like of we shift all letters a number of positions?
An integer \(n \in \mathbb{Z}\).
A line containing all uppercase letters in alphabetic order, followed by a line where the letters are shifted \(n\) positions to the left in a circular alphabet.
13
ABCDEFGHIJKLMNOPQRSTUVWXYZ
NOPQRSTUVWXYZABCDEFGHIJKLM