C31231211113313121211113313331333133313331213331333133312113313221333132233121   >>    C3123121111331312121111331333133313331333121333133313331211331322133313223312   <<    C31231211113313121211113313331333133313331213331333133312113313221333132233123   >>      C31231211113313121211113313331333133313331213331333133312113313221333132233122   >>