One other thing I noticed:
Because of the way random letters are used to make these SIRTS (some are made with fixed sets of letters) you'll occasionaly see SIRTS generated that don't "step down" properly (ie: go from a high number to a lower number).

This can happen becuase the rs method has (unfortunately) just happened to pick some random characters that are allready part of the pattern for the current line. (In fact, I think the camel SIRTS that was posted has this problem with the legs).

You can prevent ths from happening by making two minor changes:

• make $p global (ie: delete the "my")
• replace the rs method with this one...
  

  sub rs{
      my @chars = map chr, 33..126;  # all printable chars
      if (defined $p) {
          # don't use anything allready in our pattern
          @chars = grep  index($p,$_)==-1,  @chars;
      }
      my $r;
      $r .= $chars[rand @chars] for 1 .. shift;
      $r or '';
  }
  [download]

---

---

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! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

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:
	&		&
	<		&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.