<b_jonas> learn ayacc is ais523\'s yacc parser generator implementation, get it from (darcs clone http://nethack4.org/projects/ayacc) or a snapshot from "http://nethack4.org/pastebin/ayacc-2020-04.tar.gz".

#!/bin/bash
topic=$(echo "$1" | lowercase | sed 's/^\(an\?\|the\) //;s/s\?[:;,.!?]\? .*//')
echo "$1" >"$HACKENV/tmflry/$topic"
echo "Was lied to about '$topic': $1"