C31231211113313121211113313331333133313331213331323133313221233121   >>    C3123121111331312121111331333133313331333121333132313331322123312   <<    C31231211113313121211113313331333133313331213331323133313221233123   >>      C31231211113313121211113313331333133313331213331323133313221233122   >>