B3311331313231311331322331333131133133313232112311331333133313113313232211231   >>    B331133131323131133132233133313113313331323211231133133313331311331323221123   <<    B3311331313231311331322331333131133133313232112311331333133313113313232211233   >>      B3311331313231311331322331333131133133313232112311331333133313113313232211232   >>