using System;

public class Program

{

    public static void Main()

    {

        var input = "A";

        string[] alphabets = {"A", "B", "C", "D", "E", "F", "G"

                    , "H","I","J","K","L","M","N","O","P","Q","R","S","T","U"

                    ,"V","W","X","Y","Z"};

        Console.WriteLine(Array.IndexOf(alphabets, $"{input}"));

​

            for (int numberOfLoops = 0; numberOfLoops < 26; numberOfLoops++)

            {

                if (input == alphabets[numberOfLoops])

                {

                    Console.WriteLine(numberOfLoops + 1);

                }

            }

    }

}