C11112331312111112111133133313331333133313123313331331121211311   >>    C1111233131211111211113313331333133313331312331333133112121131   <<    C11112331312111112111133133313331333133313123313331331121211313   >>      C11112331312111112111133133313331333133313123313331331121211312   >>