D1212132333132233131113231313231333131323223313232223132322123221   >>    D121213233313223313111323131323133313132322331323222313232212322   <<    D1212132333132233131113231313231333131323223313232223132322123223   >>      D1212132333132233131113231313231333131323223313232223132322123222   >>