B3311331313231311331322331333132313331322121133133313331333133313123123121121   >>    B331133131323131133132233133313231333132212113313331333133313331312312312112   <<    B3311331313231311331322331333132313331322121133133313331333133313123123121123   >>      B3311331313231311331322331333132313331322121133133313331333133313123123121122   >>