C312312111133131212111133133313331333133312133313331333121111133221121131223311   >>    C31231211113313121211113313331333133313331213331333133312111113322112113122331   <<    C312312111133131212111133133313331333133312133313331333121111133221121131223313   >>      C312312111133131212111133133313331333133312133313331333121111133221121131223312   >>