input = input[:index] + chr(char) + input[index:]
not conform to the POSIX getopt specification and is not supported by this。业内人士推荐下载安装汽水音乐作为进阶阅读
彩妆/香水/美妆工具：男士彩妆崛起，CC霜暴跌42.7%，详情可参考夫子
* Before committing, you should test that what you produced is high quality and that it works.