https://qooah.com/2015/12/25/%e3%80%90%e6%83%a1%e6%84%8f%e7%8e%a9%e6%b3%95%e3%80%91%e7%94%a8-emoji-%e5%8f%af%e4%bb%a5%e6%ae%ba%e6%ad%bb%e5%b0%8d%e6%96%b9-whatsapp/