using System;

using System.Globalization;

using System.Threading;

public class Program

{

    public static void Main()

    {

        Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US", false);

        string[] strings = { "s", "As", "Bs", "Cs", "Ds", "Es", "as", "bs", "cs", "ds", "es", "AAs", "ABs", "ACs", "ADs", "AEs" };

        foreach (string str in strings)

         Console.WriteLine(str + " ends with 's': " + str.EndsWith("s"));

        Console.ReadKey();

    }

}