https://blog.gongquiz.com/2022/06/07/1%ea%b0%95-%ed%8c%8c%ec%9d%b4%ec%8d%acpython-%ec%88%98%ec%97%85%ec%9d%98-%ea%b0%9c%ec%9a%94%ec%99%80-%ed%94%84%eb%a1%9c%ea%b7%b8%eb%9e%98%eb%b0%8d%ec%9d%98-%ea%b0%9c%eb%85%90-%ed%8c%8c%ec%9d%b4-2/