C11112331312111112111133133313331333133313331312111133121111331333132233131211   >>    C1111233131211111211113313331333133313331333131211113312111133133313223313121   <<    C11112331312111112111133133313331333133313331312111133121111331333132233131213   >>      C11112331312111112111133133313331333133313331312111133121111331333132233131212   >>