title: How to do letter spacing every two letters with CSS only?
body: <p>Here is my html code:</p>
  
  <pre><code>&lt;span class="number"&gt;0102030405&lt;/span&gt;
  </code></pre>
  
  <p>I want to obtain this:</p>
  
  <p><strong>01 02 03 04 05</strong></p>
  
  <p>Here what I have tried:</p>
  
  <pre><code>.number {
      letter-spacing: 2px;
      text-weight: bold;
  }
  </code></pre>
  
  <p>but the spacing is applied between each number. How can I apply the spacing every two numbers ?</p>
  
  <p><strong><em>Note:</em></strong><br>
   I'm looking for a <strong>CSS only solution</strong>.</p>