C31231211113313121211113313331333133313331213331333133313331313311223212121   >>    C3123121111331312121111331333133313331333121333133313331333131331122321212   <<    C31231211113313121211113313331333133313331213331333133313331313311223212123   >>      C31231211113313121211113313331333133313331213331333133313331313311223212122   >>