C11112331312111112111133133313331333133313331333111133131121211   >>    C1111233131211111211113313331333133313331333133311113313112121   <<    C11112331312111112111133133313331333133313331333111133131121213   >>      C11112331312111112111133133313331333133313331333111133131121212   >>