B3311331313231311331322331333132313331322121133133313331333131123311321   >>    B331133131323131133132233133313231333132212113313331333133313112331132   <<    B3311331313231311331322331333132313331322121133133313331333131123311323   >>      B3311331313231311331322331333132313331322121133133313331333131123311322   >>