C312312111133131212111133133313331333133312133313331333121133132213222321   >>    C31231211113313121211113313331333133313331213331333133312113313221322232   <<    C312312111133131212111133133313331333133312133313331333121133132213222323   >>      C312312111133131212111133133313331333133312133313331333121133132213222322   >>