C3123121111331312121111331333133313331333121333133313112211232213221   >>    C312312111133131212111133133313331333133312133313331311221123221322   <<    C3123121111331312121111331333133313331333121333133313112211232213223   >>      C3123121111331312121111331333133313331333121333133313112211232213222   >>