class Out {
	class In {
		public In(String msg) {
			System.out.println(msg);
		}
	}
}

public class SubClass extends Out.In {
	public SubClass(Out out, String arg) {
		out.super(arg);
	}

	public static void main(String[] args) {
		SubClass subClass = new SubClass(new Out(), "hello world");
	}
}