class test66{
    public static void main(String[] a){
        System.out.println(new Test().start());
    }
}

class Test2 extends Test{
}

class Test{

    Test test;

    public int start(){
        test = test.next();
        return 0;
    }

    public Test next() {
        Test2 test2;
        test2 = new Test2();
        return test2;
    }
}