C11112331312111112111133133313331333133311222121111113313223131   >>    C1111233131211111211113313331333133313331122212111111331322313   <<    C11112331312111112111133133313331333133311222121111113313223133   >>      C11112331312111112111133133313331333133311222121111113313223132   >>