C31231211113313112133313331311331333133313331333133313311211111211331322121   >>    C3123121111331311213331333131133133313331333133313331331121111121133132212   <<    C31231211113313112133313331311331333133313331333133313311211111211331322123   >>      C31231211113313112133313331311331333133313331333133313311211111211331322122   >>