title: I want to exact match characters using regex in JS?
body: <p>I am learning regex.
  I want to match something like this -
  2 letters, 2 numbers, 4 letters, 10 numbers
  All these need to be there and in above order too.
  So far come with this regex </p>
  
  <pre><code>[A-Za-z]{2}[0-9]{2}[A-Za-z]{4}[0-9]{10}
  </code></pre>
  
  <p>But I want to do exact match.
  'XS42NLJK1234567890' should match but not this one 'XS42NLJK123456789015'
  But its matching the 2nd string too.I want exact match.
  Any help highly appreciated. </p>