C31231211113313121211113313331333133313311211331333133313232311211   >>    C3123121111331312121111331333133313331331121133133313331323231121   <<    C31231211113313121211113313331333133313311211331333133313232311213   >>      C31231211113313121211113313331333133313311211331333133313232311212   >>