C312312111133131212111133133313331333133312133313331311221123132322321   >>    C31231211113313121211113313331333133313331213331333131122112313232232   <<    C312312111133131212111133133313331333133312133313331311221123132322323   >>      C312312111133131212111133133313331333133312133313331311221123132322322   >>