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.

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.

Constraints

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

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.

见题面 Input 部分

见题面 Output 部分