C312312111133131212111133133313331333133312133313113313331313222332221   >>    C31231211113313121211113313331333133313331213331311331333131322233222   <<    C312312111133131212111133133313331333133312133313113313331313222332223   >>      C312312111133131212111133133313331333133312133313113313331313222332222   >>