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 Java (OpenJDK 11.0.6) (judge verdict: Accepted)

import java.io.BufferedReader;
import java.io.IOException;
import java.util.regex.Pattern;

import java.io.InputStreamReader;

public class Main {

    public static void main(String[] args) {

        try(var br = new BufferedReader(new InputStreamReader(System.in))) {

            if(Pattern.matches("[A-Z]", br.readLine())){
                System.out.println("A");
            }else{
                System.out.println("a");
            }

        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}