using System;

public class Program

{

    public static void Main()

    {

        // Read string from the user 

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

        //[Code] Read string from the use

        string word1 = Console.ReadLine();

        // Read string from the user 

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

        //[Code] Read string from the use

        string word2 = Console.ReadLine();

        //trim and remove all spaces

        word1 = word1.Trim();

        word2 = word2.Trim();

        //convert both to upper case

        word1 = word1.ToUpper();

        word2 = word2.ToUpper();

        //compare the two words

        if(word1==word2)

        {

            Console.WriteLine("Equal");

        }

        else

        {

            Console.WriteLine("Not Equal");

        }

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

        //find the index of the start of word year

        int intindex = strline.IndexOf("y");

        //insert an s after the word year

        strline = strline.Insert(intindex+4,"s");

​

        Console.WriteLine(strline);

    }

}

​