class A {
    private int a;
    public A(int a) { this.a = a; }
    public set(int a) { this.a = a; }
    public get() { return a; }
}

class B {
    public int b;
    public B(int b) { this.b = b; }
}

class C {
    public int c;
    public C(int c) { this.c = c; }
}

cless A1 extends A {

}

class A {
    private int n;
    public A(int n) { this.n = n; }
}




class Sten implements Comparable {
    public int compareTo(Object o) {
	if (o instanceof Sten)
	    return 0;
	else if (o instanceof Sax)
	    return 1;
	else if (o instanceof Påse)
	    return -1;
	else
	    throw new ClassCastException();
    }
}

class Sax implements Comparable {
    public int compareTo(Object o) {
	if (o instanceof Sten)
	    return -1;
	else if (o instanceof Sax)
	    return 0;
	else if (o instanceof Påse)
	    return 1;
	else
	    throw new ClassCastException();
    }
}

class Påse implements Comparable {
    public int compareTo(Object o) {
	if (o instanceof Sten)
	    return 1;
	else if (o instanceof Sax)
	    return -1;
	else if (o instanceof Påse)
	    return 0;
	else
	    throw new ClassCastException();
    }
}

public class Uppgift3 {
    public static void main(String [] args) {
	Sten sten = new Sten();
	Sax sax = new Sax();
	Påse påse = new Påse();
	System.out.println("a: " + sten.compareTo(sax));
    }
} // Uppgift3