Uses Lingua::EN::Syllable to see if something looks like a haiku (5 / 7 / 5, 17 total).
#!/usr/bin/perl

use strict;
use Lingua::EN::Syllable qw( syllable );

my( $syls, $valid );

while( <> ) {
  my $cur; my $should = $. % 2 ? 5 : 7;
  $cur += syllable( $_ ) foreach split;

  print "Line $. should be $should, is $cur\n";

  $valid = $should == $cur; $syls += $cur;
}

print "Haiku is ", $valid && $syls == 17 ? '' : 'in', "valid\n";

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In reply to haikup by Fletch

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