title: Regular expression matching specific letter combos
body: <p>I need to match the following example strings:</p>
  
  <p>LA20517505
  BN30116471</p>
  
  <p>I tried this: <code>[LA|BN].\d{8}</code></p>
  
  <p>That does indeed match, but it also matches other letters as well. I specifically need to match "LA" or "BN" followed by 8 numbers.</p>