title: Regex Match 2 Digits 0 to 9
body: <p>i'm new to regex 
  i'm trying to match a case where  there are 2 digits both can be 
  from 0-9  </p>
  
  <p>something along the lines of </p>
  
  <pre><code>[0-9][0-9] 
  </code></pre>
  
  <p>for example : </p>
  
  <blockquote>
    <p>11  10  01 </p>
  </blockquote>