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
{
    private const string UPPERCASE = "A";
    private const string LOWERCASE = "a";
    public static void Main(string[] args)
    {
        Program pg = new Program();
        pg.Exe();
    }

    public void Exe()
    {
        string input = Console.ReadLine();
        char inchar = input[0];
        int i = (int)inchar;

        string ans = i > 96 ? LOWERCASE : UPPERCASE;
        Console.WriteLine(ans);
    }
}