using System;

public class Program

{

    public static void Main()

    {

        /*/#1

        Console.WriteLine("Do you want to go to lunch?:");

        string strUserResponse = Console.ReadLine();

        strUserResponse = strUserResponse.ToLower();

        Console.WriteLine(strUserResponse);

        strUserResponse = strUserResponse.Replace("no","yes");

        Console.WriteLine(strUserResponse);

        */

        /*/#2

        string strPhone = "801-123-4567";

        String[] strArray;

        strArray = strPhone.Split('-');

        Console.WriteLine(strArray [0]);

        Console.WriteLine(strArray [1]);

        Console.WriteLine(strArray [2]);

        */

        //#3

        Console.WriteLine("Enter first word: ");

        string str1 = Console.ReadLine();

        Console.WriteLine("Enter second word; ");

        string str2 = Console.ReadLine();

        str1 = str1.Trim();

        str2 = str2.Trim();

        str1 = str1.ToLower();

        str2 = str2.ToLower();

        Console.WriteLine(str1);

        Console.WriteLine(str2);

    }

}