C31231211113313121211113313331333133313331213331323133313332212121   >>    C3123121111331312121111331333133313331333121333132313331333221212   <<    C31231211113313121211113313331333133313331213331323133313332212123   >>      C31231211113313121211113313331333133313331213331323133313332212122   >>