D121212121213132313113313231123313232233133313331323231323132311   >>    D12121212121313231311331323112331323223313331333132323132313231   <<    D121212121213132313113313231123313232233133313331323231323132313   >>      D121212121213132313113313231123313232233133313331323231323132312   >>