title: Insert characters into string in different locations
body: <p>I have a string which looks like this <code>20141007023617</code>. And I would like to make it look like this <code>2014-10-07T02:36:17Z</code>. The <code>T</code> and <code>Z</code> are very important for me. So I would like to insert them as well.</p>
  
  <p>So a recap,</p>
  
  <p><code>A1</code> holds this string          <code>20141007023617</code></p>
  
  <p><code>B1</code> should hold this string    <code>2014-10-07T02:36:17Z</code></p>