C31231211113313121211113313331333133313311211331333133313332313232233121   >>    C3123121111331312121111331333133313331331121133133313331333231323223312   <<    C31231211113313121211113313331333133313311211331333133313332313232233123   >>      C31231211113313121211113313331333133313311211331333133313332313232233122   >>