Validating Input in Google Forms
https://support.google.com/docs/answer/3378864?hl=en&ref_topic=6063592#zippy=%2Cexamples-of-regular-expressions https://www.labnol.org/internet/regular-expressions-forms/28380/ https://itsociety.rocks/tutorial/2015/09/16/How-To-Validate-Google-Forms/