D1212121212131323331323231323132312323132322331311331323133313231323111   >>    D121212121213132333132323132313231232313232233131133132313331323132311   <<    D1212121212131323331323231323132312323132322331311331323133313231323113   >>      D1212121212131323331323231323132312323132322331311331323133313231323112   >>