class ListReverse {
    ListReverse next;
    int  data;
    int length;

    public ListReverse reverse(ListReverse x) {
	ListReverse result = null;
	ListReverse tmp = null;

	while ( x != null ) {
	    tmp = x.next;
	    x.next = result;
	    result = x;
	    x = tmp;
	}

	return result;
    }
   
}