class Animal {
    private String name;
    public Animal(String name) {
        this.name = name;
    }
    public String call() {
        return  "A" + name + sound();
    }
    public abstract String sound();;
}

class duck extends Animal {
    public duck(String name) {
        super(name);
    }
    @Override public String sound() {
        return " duck says:Quack, quack";
    }
}

class chicken extends Animal {
    public chicken(String name) {
        super(name);
    }
    @Override public String sound() {
        return " chicken says:Cluck, cluck";
    }
}

class action extends Animal {
    public action(String name) {
        super(name);
    }
	if (name='Chicken'){
    @Override public String sound() {
        return " cannot fly";
    }};
	if (name='duck'){
    @Override public String sound() {
        return " can swim";
    }};
}

public class AnimalDemo {
    public static void main(String[] args) {
        Animal h = new duck("duck");
        System.out.println(h.call());
        Animal c = new chicken("Chicken");
        System.out.println(c.call());
        System.out.println(new action("Chicken").call());
        System.out.println(new action("duck").call());
    }
}