C312312111133131212111133133313331333133312133313113313331311331322121   >>    C31231211113313121211113313331333133313331213331311331333131133132212   <<    C312312111133131212111133133313331333133312133313113313331311331322123   >>      C312312111133131212111133133313331333133312133313113313331311331322122   >>