html - bulleted list having links of pdf file -

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what coding have write if want show links of .pdf files in bulleted list , when click on link , open pdf file?

<html> <head> <title>some links</title> </head>  <body>  <ul>     <li><a href="first.pdf">first file</a></li>     <li><a href="second.pdf">second file</a></li>     <li><a href="third.pdf">third file</a></li> </ul>  </body> </html>

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