C312312111133131212111133133313331333133312133313113313232331121   >>    C31231211113313121211113313331333133313331213331311331323233112   <<    C312312111133131212111133133313331333133312133313113313232331123   >>      C312312111133131212111133133313331333133312133313113313232331122   >>