C1111233131211111211113313331333133313232313331333133313331331121111121233231   >>    C111123313121111121111331333133313331323231333133313331333133112111112123323   <<    C1111233131211111211113313331333133313232313331333133313331331121111121233233   >>      C1111233131211111211113313331333133313232313331333133313331331121111121233232   >>