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:

$α$

Output

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

Sample Input 1

B

Sample Output 1

A

B is uppercase, so we should print A.

Sample Input 2

a

Sample Output 2

a

a is lowercase, so we should print a.