using System;

public class Program

{

    public static void Main()

    {

        // Question 1

        Console.WriteLine("Please enter a string");

        string string1 = Console.ReadLine();

        Console.WriteLine("Please enter another string");

        string string2 = Console.ReadLine();

        string1 = string1.ToLower();

        string1 = string1.Trim();

        string1 = string1.TrimEnd();

        string2 = string2.ToLower();

        string2 = string2.Trim();

        string2 = string2.TrimEnd();

        if (string1 == string2)

        {

            Console.WriteLine("Equal");

        }

        else

        {

            Console.WriteLine("Not Equal");

        }

        // Question 2

        string string3 = "Celebrating 200 year of Indiana University";

        int intIndexR = string3.IndexOf("r");

        int intIndex2R = string3.IndexOf("r", intIndexR + 1);

        string newString3 = string3.Insert(intIndex2R + 1, "s");

        Console.WriteLine(newString3);

    }

}