D1212121212131323331323231323132312323132322331311331323223313232213233311   >>    D121212121213132333132323132313231232313232233131133132322331323221323331   <<    D1212121212131323331323231323132312323132322331311331323223313232213233313   >>      D1212121212131323331323231323132312323132322331311331323223313232213233312   >>