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

#!/usr/bin/perl
sub k{my$t;$t=~y/IVXLCDM/XLCDMEE/,$t.=("",I,II,III,IV,V,VI,VII,VIII,IX)[$_]for/./g;$t=~s/.*E.*/Number too large/;$t}$_=(shift=~/(\w+)/)[0];print k,$/