C31231211113313121211113313331333133313311211331333133313331311331333223331221   >>    C3123121111331312121111331333133313331331121133133313331333131133133322333122   <<    C31231211113313121211113313331333133313311211331333133313331311331333223331223   >>      C31231211113313121211113313331333133313311211331333133313331311331333223331222   >>