title: RegEx to find two or more consecutive chars
body: <p>I need to determine if a string contains two or more consecutive alpha chars. Two or more <code>[a-zA-Z]</code> side by side.
  Example:</p>
  
  <pre><code>"ab" -&gt; valid
  "a1" -&gt; invalid
  "a b" -&gt; invalid
  "a"-&gt; invalid
  "a ab" -&gt; valid
  "11" -&gt; invalid
  </code></pre>