C3123121111331312121111331333133313331333121333133313111323221211   >>    C312312111133131212111133133313331333133312133313331311132322121   <<    C3123121111331312121111331333133313331333121333133313111323221213   >>      C3123121111331312121111331333133313331333121333133313111323221212   >>