C31231211113313121211113313331333133313311211331333133313232322112121   >>    C3123121111331312121111331333133313331331121133133313331323232211212   <<    C31231211113313121211113313331333133313311211331333133313232322112123   >>      C31231211113313121211113313331333133313311211331333133313232322112122   >>