Meta: the HN code should perhaps be tweaked so that *.sa submissions can handle three-level domains, as the 'base' for anything seems to be two-level (like X.uk):

* https://en.wikipedia.org/wiki/.sa#Second-level_domains

* https://en.wikipedia.org/wiki/.edu_(second-level_domain)

* https://en.wikipedia.org/wiki/.ac_(second-level_domain)