using System;

public class Program

{

    class Animal

    {

        public virtual void Eat()

        {

            Console.WriteLine("eating");

        }

    }

    class Dog : Animal

    {

        public void Bark()

        {

            Console.WriteLine("barking");

        }

        public override void Eat()

        {

            base.Eat();

            Console.WriteLine("Dogs eating too much");

        }

    }

    class Puppy : Dog

    {

        public void Weep()

        {

            Console.WriteLine("weeping");

        }

    }

    class Cat : Animal

    {

        public void Meow()

        {

            Console.WriteLine("meowing");

        }

    }

    public static void Main()

    {

        Dog dog1 = new Dog();

        dog1.Eat();

        dog1.Bark();

        Puppy puppy1 = new Puppy();

        puppy1.Eat();

        puppy1.Bark();

        puppy1.Weep();

        Cat cat1 = new Cat();

        cat1.Eat();

        cat1.Meow();

    }

}