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;

namespace alphabet
{
    class Program
    {
        static void Main(string[] args)
        {
            string inD0 = Console.ReadLine();
            char inN0 = inD0[0];

            int from_a = (int)'a';
            int to_z = (int)'z';
            int from_A = (int)'A';
            int to_Z = (int)'Z';

            if (from_a<=(int)inN0 && (int)inN0 <= to_z){
                Console.WriteLine("a");
            }
            else if(from_A <= (int)inN0 && (int)inN0 <= to_Z)
                {
                    Console.WriteLine("A");
                }

        }
    }
}