C1111233131211111211113313331333133313232321331121111133313221223311   >>    C111123313121111121111331333133313331323232133112111113331322122331   <<    C1111233131211111211113313331333133313232321331121111133313221223313   >>      C1111233131211111211113313331333133313232321331121111133313221223312   >>