using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Opel is ordinary car:");

        var opel = new Car();

        opel.Move();

        opel.Stop();

        Console.WriteLine();

        Console.WriteLine("Kamaz is ordinary truck");

        var kamaz = new Truck();

        kamaz.Move();

        kamaz.CarryCargo();

        kamaz.Stop();

        Console.WriteLine();

        Console.WriteLine("Mersedes is firetruck");

        var mersedes = new FireTruck();

        mersedes.Move();

        mersedes.Stop();

        mersedes.QuenchTheFire();

    }

}

   public class Car

{

       public void Move()

       {

           Console.WriteLine("Now car ride");

       }

       public void Stop()

       {

           Console.WriteLine("Now car stopped");

       }

   }

   public class Truck: Car

   {

       public void CarryCargo()

       {

           Console.WriteLine("The truck carries the cargo");

       }

   }

   public class FireTruck: Car

   {

       public void QuenchTheFire()

       {

           Console.WriteLine("The firetruck quench the fire");

       }

   }