B3311331313231311331322331333132313331322121133133313331333133313331221231   >>    B331133131323131133132233133313231333132212113313331333133313331333122123   <<    B3311331313231311331322331333132313331322121133133313331333133313331221233   >>      B3311331313231311331322331333132313331322121133133313331333133313331221232   >>