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  1. PO
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    <p>Many thanks to all the contributers! You've certainly shown me that I still have a lot to learn, but you have also helped me tremendously in working out my own answer. I'm just putting it here for reference and possible feedback, since there are probably better ways of doing it. To me this was the simplest and most straight forward approach I could find on my own. Enjøy! :)</p> <pre><code>#!/usr/bin/perl use strict; use warnings; # a list of words for testing my @list = qw( BAKER SALER BALER CARER RUFFR ); # populate two dimensional array with the list, # so we can compare each letter with the other letters on the same row more easily my $list_length = @list; my @words; for (my $i = 0; $i &lt; $list_length; $i++) { my @letters = split(//, $list[$i]); my $letters_length = @letters; for (my $j = 0; $j &lt; $letters_length; $j++) { $words[$i][$j] = $letters[$j]; } } # this gives a two-dimensionla array: # # @words = ( ["B", "A", "K", "E", "R"], # ["S", "A", "L", "E", "R"], # ["B", "A", "L", "E", "R"], # ["C", "A", "R", "E", "R"], # ["R", "U", "F", "F", "R"], # ); # now, on to find the word with most letters in common with the other on the same row # add up the score for each letter in each word my $word_length = @words; my @letter_score; for my $i (0 .. $#words) { for my $j (0 .. $#{$words[$i]}) { for (my $k = 0; $k &lt; $word_length; $k++) { if ($words[$i][$j] eq $words[$k][$j]) { $letter_score[$i][$j] += 1; } } # we only want to add in matches outside the one we're testing, therefore $letter_score[$i][$j] -= 1; } } # sum each score up my @scores; for my $i (0 .. $#letter_score ) { for my $j (0 .. $#{$letter_score[$i]}) { $scores[$i] += $letter_score[$i][$j]; } } # find the highest score my $max = $scores[0]; foreach my $i (@scores[1 .. $#scores]) { if ($i &gt; $max) { $max = $i; } } # and print it all out :D for my $i (0 .. $#letter_score ) { print "$list[$i]: $scores[$i]"; if ($scores[$i] == $max) { print " &lt;- best"; } print "\n"; } </code></pre> <p>When run, the script yields the following:</p> <pre><code>BAKER: 11 SALER: 11 BALER: 12 &lt;- best CARER: 10 RUFFR: 4 </code></pre>
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    1. POFind the word with most letters in common with other words
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    1. USKebman
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