C312312111133131212111133133313331333133312133313223313113322121   >>    C31231211113313121211113313331333133313331213331322331311332212   <<    C312312111133131212111133133313331333133312133313223313113322123   >>      C312312111133131212111133133313331333133312133313223313113322122   >>