D121212121213132333131232313232233131323223313231322331333133313232212311   >>    D12121212121313233313123231323223313132322331323132233133313331323221231   <<    D121212121213132333131232313232233131323223313231322331333133313232212313   >>      D121212121213132333131232313232233131323223313231322331333133313232212312   >>