<boily> le/rn \xc3\xbc/\xc3\xbc is the ridiculously happy derivative of the letter \xe2\x80\x98u\xe2\x80\x99 with respect to time.

#!/bin/sh
topic=$(echo "$1" | tr A-Z a-z)
[ -e "wisdom/$topic" ] || { echo "$1? ¯\(°_o)/¯"; exit 1; }
cat "wisdom/$topic"