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.util.Arrays;
import java.util.List;
import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    a();
  }

  public static void a() {
    try (Scanner sc = new Scanner(System.in)) {

      char al = sc.next().charAt(0);
      if (Character.isUpperCase(al)) {
        System.out.println("A");
      } else {
        System.out.println("a");
      }

    } catch (Exception e) {
      System.out.println("エラー" + e);
    }
  }
}