C312312111133131212111133133313331333133312133313113313331311331323221232131121   >>    C31231211113313121211113313331333133313331213331311331333131133132322123213112   <<    C312312111133131212111133133313331333133312133313113313331311331323221232131123   >>      C312312111133131212111133133313331333133312133313113313331311331323221232131122   >>