C3123121111113313121111331333133313311211113313331333132211212121   >>    C312312111111331312111133133313331331121111331333133313221121212   <<    C3123121111113313121111331333133313311211113313331333132211212123   >>      C3123121111113313121111331333133313311211113313331333132211212122   >>