Don't write Perl code that computes variable names. It can be done (it is called symbolic references), but it is bad practice, it is frowned upon for several good reasons, and it is bad enough that it will trigger a warning.
Use a hash instead.
Update: Just as you can shoot a bullet into your own foot or put your cat into the microwave oven, but you should not do it.
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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
intervention).
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