D1212121212131323331323231323132312323132322331311331323223313232213232311   >>    D121212121213132333132323132313231232313232233131133132322331323221323231   <<    D1212121212131323331323231323132312323132322331311331323223313232213232313   >>      D1212121212131323331323231323132312323132322331311331323223313232213232312   >>