B3311331313231311331322331333132313331322121133133313331333131123331211   >>    B331133131323131133132233133313231333132212113313331333133313112333121   <<    B3311331313231311331322331333132313331322121133133313331333131123331213   >>      B3311331313231311331322331333132313331322121133133313331333131123331212   >>