using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        string[] myStrings = new string[] { "first", "second", "third" };

        var firstString = myStrings.First(); // Get the first string

        Console.WriteLine(firstString);

        Console.WriteLine("-----------");

        var stringsContainingS = myStrings.Where( x => x.Contains('s')); // Find strings containing "s"

        foreach (var s in stringsContainingS)

        {

            Console.WriteLine(s);

        }

        Console.WriteLine("-----------");

        var stringsInReverseAlphabeticalOrder = myStrings.OrderDescending(); // Sort the array in reverse alphabetical order

        foreach (var s in stringsInReverseAlphabeticalOrder)

        {

            Console.WriteLine(s);

        }   

    }

}