https://blog.gongquiz.com/2023/03/26/%ed%95%9c%ea%b0%95%ec%97%90%ec%84%9c-%eb%aa%b0%eb%9e%98-%eb%98%a5-%ec%8b%b8%eb%8b%a4%ea%b0%80-%eb%88%84%ea%b5%b0%ea%b0%80%ec%97%90%ea%b2%8c-%eb%93%a4%ed%82%a8%eb%8b%a4%eb%a9%b4-what-if-someone-gets/