using System;

public class Program

{

    public static void Main()

    {

        float trys = 3;

        Console.WriteLine("Hello there!");

        Console.WriteLine("I'm harry, I'm yer teach'a");

        Console.WriteLine("All ya got'a do is answer the questions I give ya.");

        Console.WriteLine("ya only get 3 shots.");

        Console.WriteLine("");

        Console.WriteLine("What is 2+2?");

        int Q1 = Convert.ToInt32(Console.ReadLine());

         switch(Q1){

             case 4:

                 Console.WriteLine("Good job! what about 2+4?");

                 int Q2 = Convert.ToInt32(Console.ReadLine());

                 switch (Q2){

                     case 6:

                         Console.WriteLine("Spectacular! 3789*73289?");

                         int Q3 = Convert.ToInt32(Console.ReadLine());

                         switch (Q3){

                             case 277692021:

                                 Console.WriteLine("yer right! answer this! 834792857bgghiu3+765h7f8534hgekjf");

                                 int Q4 = Convert.ToInt32(Console.ReadLine());

                                 trys -= 1;

                                 Console.WriteLine("Oops! try again!");

                                 Q4 = Convert.ToInt32(Console.ReadLine());

                                 trys -= 1;

                                 Console.WriteLine("Oops! try again!");

                                 Q4 = Convert.ToInt32(Console.ReadLine());

                                 trys -= 1;

                                 Console.WriteLine("Oops! try again!");

                                 Q4 = Convert.ToInt32(Console.ReadLine());

                                 trys -= 1;

                                 Console.WriteLine("Oops! try again!");

                                 Q4 = Convert.ToInt32(Console.ReadLine());

                                 trys -= 1;

                                 break;

                             default:

                                 Console.WriteLine("Oops! try again!");

                                 Q4 = Convert.ToInt32(Console.ReadLine());

                                 trys -= 1;

                                 Console.WriteLine("Oops! try again!");

                                 Q4 = Convert.ToInt32(Console.ReadLine());

                                 trys -= 1;

                                 Console.WriteLine("Oops! try again!");

                                 Q4 = Convert.ToInt32(Console.ReadLine());

                                 trys -= 1;

                                 break;

                         }

                         break;

                     default:

                         Console.WriteLine("sorry, that's not it. don't give up!");

                         Q2 = Convert.ToInt32(Console.ReadLine());

                         break;

                 }

                 break;

         }

    }

}