C31231211113313121211113313331333133313331213331333133313122132322121   >>    C3123121111331312121111331333133313331333121333133313331312213232212   <<    C31231211113313121211113313331333133313331213331333133313122132322123   >>      C31231211113313121211113313331333133313331213331333133313122132322122   >>