class ex16 {
    public static void main(String[] a){
        System.out.println(new Test().start());
    }
}

class Test {

    Test test;
    int[] i;

    public int start() {
        i = new int[10];
        test = new Test();
        System.out.println(2);
        test = (test).next();
        return 0;
    }

    public Test next() {
        System.out.println(1);
        return test;
    }
}