B3311331313231311331322331333132313331323131323223313232211233132322221   >>    B331133131323131133132233133313231333132313132322331323221123313232222   <<    B3311331313231311331322331333132313331323131323223313232211233132322223   >>      B3311331313231311331322331333132313331323131323223313232211233132322222   >>