C312312111133131212111133133313331333133312133313331311331322122212121   >>    C31231211113313121211113313331333133313331213331333131133132212221212   <<    C312312111133131212111133133313331333133312133313331311331322122212123   >>      C312312111133131212111133133313331333133312133313331311331322122212122   >>