B3311331313231311331322331333132313331322121133133313331333131321133131212121   >>    B331133131323131133132233133313231333132212113313331333133313132113313121212   <<    B3311331313231311331322331333132313331322121133133313331333131321133131212123   >>      B3311331313231311331322331333132313331322121133133313331333131321133131212122   >>