B3311331313231311331322331333132313331322121133133313331333133112211321   >>    B331133131323131133132233133313231333132212113313331333133313311221132   <<    B3311331313231311331322331333132313331322121133133313331333133112211323   >>      B3311331313231311331322331333132313331322121133133313331333133112211322   >>