D1212132333131333131231323132322331313232233132323132322132322221   >>    D121213233313133313123132313232233131323223313232313232213232222   <<    D1212132333131333131231323132322331313232233132323132322132322223   >>      D1212132333131333131231323132322331313232233132323132322132322222   >>