using System;

public class Program

{

    public static void Main()

    {

        //PART 1

        //get two strings from user to compare

        Console.WriteLine("Enter a string");

        string str1 = Console.ReadLine();

        Console.WriteLine("Enter another string");

        string str2 = Console.ReadLine();

        //to compare if they are equal, trim and make upper case

        str1 = str1.Trim();

        str2 = str2.Trim();

        str1 = str1.ToUpper();

        str2 = str2.ToUpper();

        //compare the strings and return equal if equal, else return not equal

        if(str1==str2)

        {

            Console.WriteLine("Equal");

        }else

        {

            Console.WriteLine("Not Equal");

        }

        //PART 2

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

        //find index of years

        int placement = strIU.IndexOf("year");

        //Console.WriteLine(placement);

        //placement is the start of year, so add s to placement + 4 to put it after year

        strIU = strIU.Insert((placement+4),"s");

        Console.WriteLine(strIU);

    }

}