public class NoTrace {

	public static void noTrace(int i) {		
		try {
			if (i == 10) {
				System.out.println(i);
				noTrace(++i);
			}

			if (i == 11) {
				System.out.println(i);
				noTrace(--i);
			}
		} catch (Throwable t) {
			System.exit(0);
		}
	}

	public static void main(String[] args) {
		noTrace(10);
	}
}