C312312111133131212111133133313331333133312133313113313232233112331   >>    C31231211113313121211113313331333133313331213331311331323223311233   <<    C312312111133131212111133133313331333133312133313113313232233112333   >>      C312312111133131212111133133313331333133312133313113313232233112332   >>