D1212132333132233131113231313231323331323331333131311233132213111   >>    D121213233313223313111323131323132333132333133313131123313221311   <<    D1212132333132233131113231313231323331323331333131311233132213113   >>      D1212132333132233131113231313231323331323331333131311233132213112   >>