C31231211113313121211113313331333133313331213331333133313113221   >>    C3123121111331312121111331333133313331333121333133313331311322   <<    C31231211113313121211113313331333133313331213331333133313113223   >>      C31231211113313121211113313331333133313331213331333133313113222   >>