B3311331313231311331322331333132313331322121133133313331333133313231232221   >>    B331133131323131133132233133313231333132212113313331333133313331323123222   <<    B3311331313231311331322331333132313331322121133133313331333133313231232223   >>      B3311331313231311331322331333132313331322121133133313331333133313231232222   >>