As this question very much looks like homework to me, let me iterate that this is not a script writing service. Learning Perl and programming, whether for homework or for furthering your knowledge works best in my experience if you first have a try at solving the problem yourself. If you have already tried solving the problem yourself, it helps us help you better if you show us what you tried and where you found problems with your approach. That way, we can tailor our answers towards your needs and expand the section where we see your error.
If you haven't tried anything yourself, start by reading sort and splice. I'm not sure why you would want to use splice at all.
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Snippets of code should be wrapped in
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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