C312312111133131212111133133313331333133312133313331333132221123313111   >>    C31231211113313121211113313331333133313331213331333133313222112331311   <<    C312312111133131212111133133313331333133312133313331333132221123313113   >>      C312312111133131212111133133313331333133312133313331333132221123313112   >>