D1212132333132233131113231313231333131323223313232223133313231333221   >>    D121213233313223313111323131323133313132322331323222313331323133322   <<    D1212132333132233131113231313231333131323223313232223133313231333223   >>      D1212132333132233131113231313231333131323223313232223133313231333222   >>