B3311331313231311331322331333132233131133132233133313231331123231312321   >>    B331133131323131133132233133313223313113313223313331323133112323131232   <<    B3311331313231311331322331333132233131133132233133313231331123231312323   >>      B3311331313231311331322331333132233131133132233133313231331123231312322   >>