<b_jonas> slashlearn euclid//Euclid is a short geeky game in which the goal is to do Euclidean compass and straightedge constructions in as few steps as possible. It runs in the browser, found at "http://www.euclidthegame.com/". It was popular among #esoteric regulars in 2016-07.

#!/bin/sh
exec perl -CS -Mutf8 -pwe 'my$vow=qr/[aeiouyäö]/i;my$con=qr/[b-df-hj-np-tv-xz]/i;1while s/($vow$con*)($con$vow)/$1-$2/g;1while s/a[eoyäö]|e[aoäö]|i[aoäö]|o[aeyäö]|u[aeyäö]|y[aeouä]|ä[aeouö]|ö[aeouä]/my@s=split"",$&;$s[0]."-".$s[1]/egi'