<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.

if [ -z $(tr [A-Z] [a-z] <<< "$1") ]; then echo "Hello, world!"; else if [ -f ${HACKENV-/hackenv}/hw/$(tr [A-Z] [a-z] <<< "$1") ]; then cat ${HACKENV-/hackenv}/hw/$(tr [A-Z] [a-z] <<< "$1"); else echo "Your language does not exist"; fi; fi