B3311331313231311331322331333132313331322121133133313331333132221123233321   >>    B331133131323131133132233133313231333132212113313331333133313222112323332   <<    B3311331313231311331322331333132313331322121133133313331333132221123233323   >>      B3311331313231311331322331333132313331322121133133313331333132221123233322   >>