C31231211113313121211113313331333133313331213331333133311211233133313231323121   >>    C3123121111331312121111331333133313331333121333133313331121123313331323132312   <<    C31231211113313121211113313331333133313331213331333133311211233133313231323123   >>      C31231211113313121211113313331333133313331213331333133311211233133313231323122   >>