C312312111133131212111133133313331333133312133313331333223313221231221   >>    C31231211113313121211113313331333133313331213331333133322331322123122   <<    C312312111133131212111133133313331333133312133313331333223313221231223   >>      C312312111133131212111133133313331333133312133313331333223313221231222   >>