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 C# (Mono-csc 3.5.0) (judge verdict: Wrong Answer)

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
public class Hello{
    public static void Main(){
        // Your code here!
        //var n = int.Parse(Console.ReadLine());
        //string str = Console.ReadLine();
        string str = Console.ReadLine();
        string ans = "";
        //var t = Console.ReadLine();
        if(str.Equals(str.ToUpper())){
            ans = str.ToLower();
        }
        else{
            ans = str.ToUpper();
        }
        
        Console.WriteLine(ans);
    }
}