Have you even read Writeup Formatting Tips yet?

<p> tags start paragraphs, and </p> tags end them.

There's almost never a need for <br />

Wrap your code in <code> and </code>, or <c> and </c> tags. That goes for your input and output examples as well.

Read How do I compose an effective node title?.

Post a snippet of code that you have actually started to write for the purpose of solving this specific problem. It appears to me that the code you posted is to solve a different task.

Ask a specific question. Your existing posts are asking for someone to write a solution for you. There are people who will do that for you for a fee. But we help people to learn to program using Perl for free. So you must put out some effort showing that you are actually here to learn Perl, not just here to get us to write a script for you.