C31231211113313121211113313331333133313331213331311331333223313232211   >>    C3123121111331312121111331333133313331333121333131133133322331323221   <<    C31231211113313121211113313331333133313331213331311331333223313232213   >>      C31231211113313121211113313331333133313331213331311331333223313232212   >>