title: Flex regular expression for strings with either single or double quotes
body: <p>I am writing a regular expression for a lexical analyzer for class. I presently have a regular expression written for regular strings with double quotes, however my professor wants us to account for single quotes, too.</p>
  <p>Here is my current regular expression:</p>
  <p><a href="https://i.stack.imgur.com/wA7ja.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wA7ja.png" alt="enter image description here" /></a></p>
  <p>I am unsure as to how to make it accept both kinds.</p>
  <p>Thank you in advance!</p>