D1212132333132233131113231313231323331323331333131323233233313231211   >>    D121213233313223313111323131323132333132333133313132323323331323121   <<    D1212132333132233131113231313231323331323331333131323233233313231213   >>      D1212132333132233131113231313231323331323331333131323233233313231212   >>