C31231211111133131211113313331333121111133313331333133313232212231   >>    C3123121111113313121111331333133312111113331333133313331323221223   <<    C31231211111133131211113313331333121111133313331333133313232212233   >>      C31231211111133131211113313331333121111133313331333133313232212232   >>