B3311331313231311331322331333132313231333131323223313231313232223221   >>    B331133131323131133132233133313231323133313132322331323131323222322   <<    B3311331313231311331322331333132313231333131323223313231313232223223   >>      B3311331313231311331322331333132313231333131323223313231313232223222   >>