D1212121212131323331312323132322331313232233132322331311331322123111   >>    D121212121213132333131232313232233131323223313232233131133132212311   <<    D1212121212131323331312323132322331313232233132322331311331322123113   >>      D1212121212131323331312323132322331313232233132322331311331322123112   >>