title: Extract letter from String characters and numbers
body: <p>I have these <code>Strings</code>:</p>
  
  <pre><code>"Turtle123456_fly.me"
  "birdy_12345678_prd.tr"
  </code></pre>
  
  <p>I want the first words of each, ie:</p>
  
  <pre><code>Turtle
  birdy
  </code></pre>
  
  <p>I tried this:</p>
  
  <pre><code> Pattern p = Pattern.compile("//d");
   String[] items = p.split(String);
  </code></pre>
  
  <p>but of course it's wrong. I am not familiar with using <code>Pattern</code>.</p>