title: Replacing in multiple files one by one
body: <p>I am not good in computers so pardon me if this is stupid.
  I have around 4800 text files in a folder (all have list of stocks and their OHLC values for each day of an exchange) where in the past some of the symbol names have changed.</p>
  
  <p>I have a list of more than 500 old and new symbol names. What I wish to do is replace the old symbols with new symbols one by one (not all at once as there are multiple symbol name changes for a stock in the past).</p>
  
  <p>The only problem is:</p>
  
  <ol>
  <li>I cannot do it manually as it is a really long list.</li>
  <li>I cannot do it all in bulk as stated in the link here because it breaks the data (due to multiple name changes in the past). <a href="https://stackoverflow.com/questions/11389466/multiple-word-search-and-replace-in-notepad/16104946#16104946">Multiple word search and replace in notepad++</a></li>
  </ol>
  
  <p>So is there a way you can suggest that I can do one by one replacement automatically in multiple files?</p>
  
  <p><a href="https://i.stack.imgur.com/YcmLF.jpg" rel="nofollow noreferrer">One of the 4800+ txt files</a></p>
  
  <p><a href="https://i.stack.imgur.com/SK7Ss.jpg" rel="nofollow noreferrer">List of symbols to be renamed</a></p>