'gt' refers to the size of the string, running your example solution didn't seem to help. I was going for (and failed) non-equality of the substring means they are identical in sort order by using 'eq'.
Snippets of code should be wrapped in
<code> tags not<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor