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  1. or download this
    <html>
<head>
...
</body>
</html>
  2. or download this
    #!/usr/bin/perl
# script to verify that value is a 4 digit number
...
} else {
  print "<p style=\"font-family: courier; color: red\"><-- ERROR: not 
+a 4 digit number!</p>\n";
}
  3. or download this
    #!/usr/bin/perl
# script to verify that value is a 4 letter word
...
} else {
  print "<p style=\"font-family: courier; color: red\"><-- ERROR: not 
+a 4 letter word!</p>\n";
}