C312312111133131212111133133313331333133312133313331333132232233121   >>    C31231211113313121211113313331333133313331213331333133313223223312   <<    C312312111133131212111133133313331333133312133313331333132232233123   >>      C312312111133131212111133133313331333133312133313331333132232233122   >>