title: Generate a string with random words
body: <p>I need to write a function which will randomize some words of my string. For example:</p>
  
  <pre><code>[Hello|Hi] guys. This is my [code|string]
  </code></pre>
  
  <p>The function should return:</p>
  
  <p><code>Hello guys. This is my code</code></p>
  
  <p>or</p>
  
  <p><code>Hi guys. This is my string</code></p>