C11112331312111112111133133313331333133313123313331333131211113313331322232311   >>    C1111233131211111211113313331333133313331312331333133313121111331333132223231   <<    C11112331312111112111133133313331333133313123313331333131211113313331322232313   >>      C11112331312111112111133133313331333133313123313331333131211113313331322232312   >>