B3311331313231311331322331333132313331322331323133313232233131333221321   >>    B331133131323131133132233133313231333132233132313331323223313133322132   <<    B3311331313231311331322331333132313331322331323133313232233131333221323   >>      B3311331313231311331322331333132313331322331323133313232233131333221322   >>