D1212121212131323331323231323132312323132322331311331323132313221121131   >>    D121212121213132333132323132313231232313232233131133132313231322112113   <<    D1212121212131323331323231323132312323132322331311331323132313221121133   >>      D1212121212131323331323231323132312323132322331311331323132313221121132   >>