D121212121213132333131232313232233131323223313233231333132313232212111   >>    D12121212121313233313123231323223313132322331323323133313231323221211   <<    D121212121213132333131232313232233131323223313233231333132313232212113   >>      D121212121213132333131232313232233131323223313233231333132313232212112   >>