using System;

public class Program

{

    public static void Main()

    {

        //Q1

        //ask user for string

        Console.WriteLine("Please input a string:");

        string str1 = Console.ReadLine();

        Console.WriteLine("Please input a second string:");

        string str2 = Console.ReadLine();

        //change strings to lower case

        str1 = str1.ToLower();

        str2 = str2.ToLower();

        //trim string to get read of leading and trailing spaces

        str1 = str1.Trim();

        str2 = str2.Trim();

        //if function to see if the strings are equal

        if (str1 == str2)

        {

            Console.WriteLine("Equal");

        }

        else

        {

            Console.WriteLine("Not Equal");

        }

        //Q2

        //create string

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

        //find index of second r in string

        int iSpace = strCelebrate.IndexOf("r",6);

        //insert new letter and print new string

        strCelebrate = strCelebrate.Insert(iSpace + 1,"s");

        Console.WriteLine(strCelebrate);

    }

}