C1111233131211111211113313331333133313331333133313331333133313113313123121221   >>    C111123313121111121111331333133313331333133313331333133313331311331312312122   <<    C1111233131211111211113313331333133313331333133313331333133313113313123121223   >>      C1111233131211111211113313331333133313331333133313331333133313113313123121222   >>