C31231211113313121211113313331333133313331213331333133313222312221   >>    C3123121111331312121111331333133313331333121333133313331322231222   <<    C31231211113313121211113313331333133313331213331333133313222312223   >>      C31231211113313121211113313331333133313331213331333133313222312222   >>