B3311331313231311331322331333132313331322121133133313232221123231   >>    B331133131323131133132233133313231333132212113313331323222112323   <<    B3311331313231311331322331333132313331322121133133313232221123233   >>      B3311331313231311331322331333132313331322121133133313232221123232   >>