D1212132333131113231323221323123231313231323223313231323331323133112323221111   >>    D121213233313111323132322132312323131323132322331323132333132313311232322111   <<    D1212132333131113231323221323123231313231323223313231323331323133112323221113   >>      D1212132333131113231323221323123231313231323223313231323331323133112323221112   >>