B3311331313231311331322331333132313232233131311331333132313331323123232223221   >>    B331133131323131133132233133313231323223313131133133313231333132312323222322   <<    B3311331313231311331322331333132313232233131311331333132313331323123232223223   >>      B3311331313231311331322331333132313232233131311331333132313331323123232223222   >>