import java.awt.*;
import java.applet.Applet;

public class Farm extends Applet {

    public void init() {
	    Pig wilber = new Pig();
	    Cow daisy = new Cow();

	    Animal animal;

	    animal = daisy;
	    String talk = animal.says();
            add(new TextField(talk));

	    animal = wilber;
	    talk = animal.says();
            add(new TextField(talk));
    }
}

class Animal {
	private int legs = 4;

	public String says() {
		return "Animals can't talk!";
	}
}

class Cow extends Animal {
	public String says() {
		return "Moo";
	}
}

class Pig extends Animal {
	public String says() {
		return "Grunt";
	}
}

class Snake extends Animal {
	private int legs = 0;
}