B3311331313231311331322331333132313331322121133133313331333133313112232212311   >>    B331133131323131133132233133313231333132212113313331333133313331311223221231   <<    B3311331313231311331322331333132313331322121133133313331333133313112232212313   >>      B3311331313231311331322331333132313331322121133133313331333133313112232212312   >>