D121212121213132333132323132313231232313132313232233132313232213231311   >>    D12121212121313233313232313231323123231313231323223313231323221323131   <<    D121212121213132333132323132313231232313132313232233132313232213231313   >>      D121212121213132333132323132313231232313132313232233132313232213231312   >>