B3311331313231311331322331333132233131133132233133313231331123231323132313221   >>    B331133131323131133132233133313223313113313223313331323133112323132313231322   <<    B3311331313231311331322331333132233131133132233133313231331123231323132313223   >>      B3311331313231311331322331333132233131133132233133313231331123231323132313222   >>