https://blog.wongcw.com/2019/04/01/dna%e5%8c%96%e8%ba%ab%e7%a1%ac%e7%9b%a4%ef%bc%9a%e8%8a%b1%e8%b2%bb21%e5%80%8b%e5%b0%8f%e6%99%82%e4%bf%9d%e5%ad%985%e5%80%8b%e5%ad%97%e6%af%8d/