C312312111133131212111133133313331333133312133313331333132222223311   >>    C31231211113313121211113313331333133313331213331333133313222222331   <<    C312312111133131212111133133313331333133312133313331333132222223313   >>      C312312111133131212111133133313331333133312133313331333132222223312   >>