https://blog.faceutil.com/2017/03/30/msx-%ed%82%b9%ec%8a%a4-%eb%b2%a8%eb%a6%ac2-kings-valley-ii-%ec%99%95%ea%b0%80%ec%9d%98-%ea%b3%84%ea%b3%a1-ii-%ec%97%98%ea%b8%b0%ec%9e%90%ec%9d%98-%eb%b4%89%ec%9d%b8-%e7%8e%8b%e5%ae%b6/