using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("String array checker");

        Boolean NoPdfPassworda = passwordchecker("a");

        Console.WriteLine(NoPdfPassworda);

         Boolean NoPdfPasswordc = passwordchecker("c");

        Console.WriteLine(NoPdfPasswordc);

    }

    public static Boolean passwordchecker(string userName)

        {

            string[] group = new string[] { "a", "b" };

            if (group[0] == userName || group[1] == userName)

            {

                return true;

            }

            else

            {

                return false;

            }

        }

}