Inspired by some of the really interesting and sometimes amazing ideas I've seen in other threads, here's my first attempt at doing this kind of thing...

  use warnings;use strict;my $c="
  1#3#4#5#6#7#8#9#10#11#18#25#29#
  34#35#36#37#126#127#128#130#133
  #134#243#250#251#252#253#254###
  257#135#136#137#138#139#145#146
  #149#150#154#";my @l=split" ","

  P X U S E S T R I C T G L A F I
  I E E R Z I A P S Z R E E A W N
  X A R R A Y E K E D J D L D F J
  D F S L W M N C J C E R I C E R
  U H F C M O N L E N G T H I D O
  M R X H M H Z W I E R X W A S D
  H E Y L C E S T R V H W D E W Q
  E G R X W M U A D F E G E L S E
  C E M J F O R E A C H T R H E C
  P X U H R D T Y R P Y N B X P B
  W C B B Z U E N R A W A C V R E
  D F U V D L S A C N B V Y A I T
  S S E L B U B H E W S D L N N D
  A D X G E S F K S J G A R T T F
  F G I E B N S B Z A C W Q U E A
  S D T G A E R N N S H P A J Q D

  ";my @hidden_words_to_find =qq(

  PERL,       USESTRICT,  ARRAY,
  PERLMONKS,  LENGTH,     WHILE,
  FOREACH,    MODULUS,    CPAN,
  SUBROUTINE, PRINT,      SCALAR,
  REGEX, IF,  ELSE,       WARN,

  );$c.="38#40#45#52#54#55#59#235
  #72#73#74#75#76#77#82#85#89#93#
  98#100#104#114#115#118#119#125#
  159#164#166#168#169#170#171#175
  #179#182#186#190#191#193#194###
  195#196#197#198#200#205#207#211
  #214#217#220#223#227#234#61#70#
  16#15";$c=~s/##//g;my @k= split
  "#",$c;@k=sort{$a<=>$b}@k;for(0
  ..$#l+1){if($k[0]and$k[0]==$_){
  print $l[$_-1];shift@k;} else {
  print" ";} print" ";print"\n  "
  if$_%16==0;}print"\n";exit;#jeb
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Critiques appreciated!