C31231211113313121211113313331333133313331213331311331323223313121221   >>    C3123121111331312121111331333133313331333121333131133132322331312122   <<    C31231211113313121211113313331333133313331213331311331323223313121223   >>      C31231211113313121211113313331333133313331213331311331323223313121222   >>