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(input) {
    var alp = /[A-Z]/;
    var result;
    
    function isUpperCase(str){
        return str.match(alp);
    }
    
    if(isUpperCase(input)){
        result = "A";
    }else{
        result = "a";
    }
    
    console.log(result);
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));