C11112331312111112111133133313331333133313223223313121111331313123311   >>    C1111233131211111211113313331333133313331322322331312111133131312331   <<    C11112331312111112111133133313331333133313223223313121111331313123313   >>      C11112331312111112111133133313331333133313223223313121111331313123312   >>