D1212121212131323331312323132322331313232233132313223313331313311232313131   >>    D121212121213132333131232313232233131323223313231322331333131331123231313   <<    D1212121212131323331312323132322331313232233132313223313331313311232313133   >>      D1212121212131323331312323132322331313232233132313223313331313311232313132   >>