D1212121212131323331312323132322331313232233132322331311331323113313231311   >>    D121212121213132333131232313232233131323223313232233131133132311331323131   <<    D1212121212131323331312323132322331313232233132322331311331323113313231313   >>      D1212121212131323331312323132322331313232233132322331311331323113313231312   >>