title: How to find first char without adjacent duplicates in a string with regexp?
body: <p>I have a sting and need to find first  character without adjacent duplicates. I wonder how to do it with regexp. Here is what i supposed should it be.
  For example for string=<code>aabbbcddg</code> answer is <code>c</code>.</p>
  
  <pre><code>const paragraph='aabbbcddg';
  console.log(paragraph.match(/(.)\1{1}/));
  </code></pre>
  
  <p>or</p>
  
  <pre><code>const paragraph='aabbbcddg';
  console.log(paragraph.match(/[.]{1}/));
  </code></pre>
  
  <p>Can you explain why my solutions don't work? </p>