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# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
class Program
{

    static void Main()
    {
        string S = Console.ReadLine();

        if (S=="A"||S=="B"|| S == "C" || S == "D" || S == "E" || S == "F" || S == "G" || S == "H" || S == "I" || S == "J" || S == "K" || S == "L" || S == "M" || S == "N" || S == "O" || S == "P" || S == "Q" || S == "R" || S == "S" || S == "T" || S == "U" || S == "V" || S == "W" || S == "X" || S == "Y" || S == "Z")
        {
            Console.WriteLine("A");
        }
        else
        {
            Console.WriteLine("a");
        }
    }

}