B3311331313231311331322331333132323133313223313231323133313232223221   >>    B331133131323131133132233133313232313331322331323132313331323222322   <<    B3311331313231311331322331333132323133313223313231323133313232223223   >>      B3311331313231311331322331333132323133313223313231323133313232223222   >>