Assuming you pipe the contents of a dict type file into the following script:

#! /usr/bin/perl

my %stem;
while( <> ) {
        chomp;
        next unless /^(.*)(?:m|rn)$/;
        print "${1}m -vs- ${1}rn\n" if ++$stem{$1} == 2;
}

[download]

... on FreeBSD 5.2 this produces the following:

album -vs- alburn
am -vs- arn
bam -vs- barn
bom -vs- born
bum -vs- burn
chum -vs- churn
cum -vs- curn
dam -vs- darn
dom -vs- dorn
dum -vs- durn
gam -vs- garn
gim -vs- girn
ham -vs- harn
hem -vs- hern
kim -vs- kirn
leam -vs- learn
scam -vs- scarn
sham -vs- sharn
stam -vs- starn
stem -vs- stern
swom -vs- sworn
tam -vs- tarn
tum -vs- turn
um -vs- urn
yam -vs- yarn

[download]

The only trouble is... I can't figure out which pair are the antonyms (mad props to halley :-). To tell the truth, I don't even know what a "swom" is...

In reply to Re: The evolution of a solution to the 11/23 NPR puzzler. by grinder
in thread The evolution of a solution to the 11/23 NPR puzzler. by grendelkhan

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.