import java.io.*;

class GFG {

    public static void main(String[] args)

    {

        System.out.println("GfG!");

        Dog dog = new Dog();

        dog.name = "Bull dog";

        dog.color = "Brown";

        dog.bark();

        dog.run();

        Cat cat = new Cat();

        cat.name = "Rag doll";

        cat.pattern = "White and slight brownish";

        cat.meow();

        cat.run();

        Animal animal = new Animal();

        animal.name = "My favourite pets";

        animal.run();

    }

}

class Animal {

    String name;

    public void run()

    {

        System.out.println("Animal is running!");

    }

}

class Dog extends Animal { 

/// the class dog is the child and animal is the parent

    String color;

    public void bark()

    {

        System.out.println(name + " Wooh ! Wooh !"

                           + "I am of colour " + color);

    }

}

class Cat extends Animal {

    String pattern;

    public void meow()

    {

        System.out.println(name + " Meow ! Meow !"

                           + "I am of colour " + pattern);

    }

}