title: How to split string into 2 parts after certain position
body: <p>For example I have some random string:</p>
  
  <pre><code>str = "26723462345"
  </code></pre>
  
  <p>And I want to split it in 2 parts after 6-th char. How to do this correctly?</p>
  
  <p>Thank you!</p>