B3311331313231311331322331333132313331322121133133313331333132232131123331   >>    B331133131323131133132233133313231333132212113313331333133313223213112333   <<    B3311331313231311331322331333132313331322121133133313331333132232131123333   >>      B3311331313231311331322331333132313331322121133133313331333132232131123332   >>