Score : $100$ points

Problem Statement

An uppercase or lowercase English letter $\alpha$ will be given as input. If $\alpha$ is uppercase, print A; if it is lowercase, print a.

Constraints

• $\alpha$ is an uppercase (A - Z) or lowercase (a - z) English letter.

Input

Input is given from Standard Input in the following format:

$\alpha$

Output

If $\alpha$ is uppercase, print A; if it is lowercase, print a.

B

A

B is uppercase, so we should print A.

a

a

a is lowercase, so we should print a.