title: Minify and Unminify String Function
body: <p>I have a string like <code>3ZwgC3xOuq1LpbL4Ajs5</code>. I want to create a function that take that string and convert like <code>3DV3A2</code> etc. It will shorten the string and likewise give me the previous string when I export the shortened string.</p>
  <p>I am using <code>Dart</code> btw.</p>
  <p><code>3ZwgC3xOuq1LpbL4Ajs5</code> -------- CONVERT TO --------&gt; <code>3DV3A2</code> <BR>
  <code>3DV3A2</code> -------- CONVERT TO --------&gt; <code>3ZwgC3xOuq1LpbL4Ajs5</code></p>