C11112331312111112111133133313331333133313331333133313331211113313232312311   >>    C1111233131211111211113313331333133313331333133313331333121111331323231231   <<    C11112331312111112111133133313331333133313331333133313331211113313232312313   >>      C11112331312111112111133133313331333133313331333133313331211113313232312312   >>