C31231211113313121211113313331333133313331213331333133313132322331121   >>    C3123121111331312121111331333133313331333121333133313331313232233112   <<    C31231211113313121211113313331333133313331213331333133313132322331123   >>      C31231211113313121211113313331333133313331213331333133313132322331122   >>