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.Linq;

namespace fightx
{
    class Program
    {
        static void Main(string[] args)
        {
            /* int[] NK = Console.ReadLine().Split(" ").Select(int.Parse).ToArray();
             int[] PN = Console.ReadLine().Split(" ").Select(int.Parse).ToArray();
             Array.Sort(PN);
             int ans = 0;
             for (int a = 0; a < NK[1]; a++)
                 ans += PN[a];
             Console.WriteLine(ans);*/
            /*   string N = "a";
               char c = N[0];
               */
            string N = Console.ReadLine();
            char c = N[0];
            if (Char.IsLower(c))
            {
                Console.WriteLine("a");
            }
            else
            {
                Console.WriteLine("Ak");
            }





        }
    }
}