Problem:
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:

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.

Solution in JavaScript (Node.js 12.16.1) (judge verdict: Accepted)

function Main(arg) {
    var arg = arg.trim();
    if( /^[A-Z]+$/g.test(arg) ){
      console.log('A');
    } else {
      console.log('a');
    }
    return;
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));