https://paiza.io/projects/C-94v_l-FkUD0CqCZ6qhLQ?language=php
https://paste2.org/JNPA0Kez
https://hackmd.io/s/BkAzbXH3ye
https://paiza.io/projects/aqd36CvB4MXtmTQvPcoezQ?language=php
https://paste2.org/B1F1EHLf