using System;

public class Program

{

    public static void Main()

    {

        //Question 1

        Console.WriteLine("Input first string.");

        string FirstStr = Console.ReadLine();

        Console.WriteLine("Input second string.");

        string SecondStr = Console.ReadLine();

        //Leading spaces

        string TrimFirst = FirstStr.Trim();

        string TrimSecond = FirstStr.Trim();

        //Case

        string UpperFirst = TrimFirst.ToUpper();

        string UpperSecond = TrimSecond.ToUpper();

        //Equal?

        bool StringEqual = TrimFirst.Contains(TrimSecond);

        if (StringEqual == true)

        {

            Console.WriteLine("Equal");

        }

        else if (StringEqual == false)

        {

            Console.WriteLine("Not equal");

        }

        //Question 2

        string strCelebration = "Celebrating 200 year of Indiana University";

        int intFirstSpace = strCelebration.IndexOf(" ");

        int intSecondSpace = strCelebration.IndexOf(" ",intFirstSpace + 1);

        int intThirdSpace = strCelebration.IndexOf(" ",intSecondSpace + 1);

        string strCelebration2 = strCelebration.Insert(intThirdSpace,"s");

        Console.WriteLine(strCelebration2);

    }

}