D1212132333132233131113231313231333131323223313232223133313231232311   >>    D121213233313223313111323131323133313132322331323222313331323123231   <<    D1212132333132233131113231313231333131323223313232223133313231232313   >>      D1212132333132233131113231313231333131323223313232223133313231232312   >>