C312312111133131212111133133313331333133112113313331333133313113313232233211   >>    C31231211113313121211113313331333133313311211331333133313331311331323223321   <<    C312312111133131212111133133313331333133112113313331333133313113313232233213   >>      C312312111133131212111133133313331333133112113313331333133313113313232233212   >>