C312312111133131212111133133313331333133312133313121111123232233132332321   >>    C31231211113313121211113313331333133313331213331312111112323223313233232   <<    C312312111133131212111133133313331333133312133313121111123232233132332323   >>      C312312111133131212111133133313331333133312133313121111123232233132332322   >>