C11112331312111112111133133313331333133313123313331333131211212131   >>    C1111233131211111211113313331333133313331312331333133313121121213   <<    C11112331312111112111133133313331333133313123313331333131211212133   >>      C11112331312111112111133133313331333133313123313331333131211212132   >>