C312312111133131212111133133313331333133312133313331311221123232111211   >>    C31231211113313121211113313331333133313331213331333131122112323211121   <<    C312312111133131212111133133313331333133312133313331311221123232111213   >>      C312312111133131212111133133313331333133312133313331311221123232111212   >>