title: Add space between time and PM/AM in spreadsheet
body: <p>I have a spreadsheet with a couple hundred rows. Two of the columns contain times. There are 4 different possibilities for what the times can look like. The numbers can be anything, this is to demonstrate the spacing issues between the time and am/pm</p>
  
  <pre><code>1:30PM
  4:30 PM
  11:30AM
  9:30 AM
  </code></pre>
  
  <p>Is there a way I can have excel automatically put a space if there isn't one, and not do anything if there is, so the above list would look like the following</p>
  
  <pre><code>1:30 PM
  4:30 PM
  11:30 AM
  9:30 AM
  </code></pre>