title: Read the sheet name which contains specific string as sheet name from multiple files and concatenate in pandas
body: <p>I have multiple files which are in the form of xlsx and which contain multiple sheets.</p>
  <p>I want to read only those sheets which contain &quot;video games&quot; as the sheet name and append it.</p>
  <p><strong>Ex:</strong> In 1st file among multiple files 1 of the sheet name is <strong>2.Video Games</strong>, in another file sheet is <strong>4.VIDEO GAMES</strong>, in another file sheet name as <strong>video games</strong> etc. And all these sheets needs to be considered.</p>
  <p>How to write code in pandas which reads the sheet name which contains specific string as sheet name from multiple files and concatenate/append those sheets into 1 sheet.</p>