C312312111133131212111133133313331333133312133313113313113313331323221123321221   >>    C31231211113313121211113313331333133313331213331311331311331333132322112332122   <<    C312312111133131212111133133313331333133312133313113313113313331323221123321223   >>      C312312111133131212111133133313331333133312133313113313113313331323221123321222   >>