The code to search for additional letters is

<td[A-Z]?

You’ll want to set the replace character to

<td

A lot of people need to remove URLs from a copied webpage, instead of removing the links one by one you can use regex to remove URLS that have slightly different links with this REGEX code:

// Example: you want to select a long list of URLS for removal from a webpage.

<a href="https://www.sethcodes.com/file/7045">
<a href="https://www.sethcodes.com/file/7035">

// This will select the entirety of both above lines:
<a href="https://www.sethcodes.com/file/70[0-9]*[0-9]">

[0-9]* Selects any number from 0-9
[A-Z]* Selects any letter from A-Z