C11112331312111112111133133313331333132322121111331333112211231331   >>    C1111233131211111211113313331333133313232212111133133311221123133   <<    C11112331312111112111133133313331333132322121111331333112211231333   >>      C11112331312111112111133133313331333132322121111331333112211231332   >>