D1212121212131323331312323132322331313232233132313223313331313212111   >>    D121212121213132333131232313232233131323223313231322331333131321211   <<    D1212121212131323331312323132322331313232233132313223313331313212113   >>      D1212121212131323331312323132322331313232233132313223313331313212112   >>