https://blog.faceutil.com/2017/03/28/mame%eb%a7%88%eb%a9%94-%ed%94%84%eb%a1%9c%ea%b7%b8%eb%9e%a8%ec%9d%84-%eb%8b%a4%ec%9a%b4%eb%b0%9b%ec%95%84-%eb%b3%b4%ec%9e%90-k/