C31231211113313121211113313331333133313311211331333133313331333133313221322121   >>    C3123121111331312121111331333133313331331121133133313331333133313331322132212   <<    C31231211113313121211113313331333133313311211331333133313331333133313221322123   >>      C31231211113313121211113313331333133313311211331333133313331333133313221322122   >>