B3311331313231311331322331333132313331322121133133313331333133112111112211   >>    B331133131323131133132233133313231333132212113313331333133313311211111221   <<    B3311331313231311331322331333132313331322121133133313331333133112111112213   >>      B3311331313231311331322331333132313331322121133133313331333133112111112212   >>