D1212132333132233131113231313231323331323331333131323112211231213221   >>    D121213233313223313111323131323132333132333133313132311221123121322   <<    D1212132333132233131113231313231323331323331333131323112211231213223   >>      D1212132333132233131113231313231323331323331333131323112211231213222   >>