B3311331313231311331322331333132233131133132233133313231331123231323132312331   >>    B331133131323131133132233133313223313113313223313331323133112323132313231233   <<    B3311331313231311331322331333132233131133132233133313231331123231323132312333   >>      B3311331313231311331322331333132233131133132233133313231331123231323132312332   >>