C312312111133131212111133133313331333133312133313331333121111132233122311   >>    C31231211113313121211113313331333133313331213331333133312111113223312231   <<    C312312111133131212111133133313331333133312133313331333121111132233122313   >>      C312312111133131212111133133313331333133312133313331333121111132233122312   >>