B3311331313231311331322331333132313331322121133133313331333133313113311212321   >>    B331133131323131133132233133313231333132212113313331333133313331311331121232   <<    B3311331313231311331322331333132313331322121133133313331333133313113311212323   >>      B3311331313231311331322331333132313331322121133133313331333133313113311212322   >>