title: Remove lines that is shorter than 5 characters before the @ using Notepad++
body: <p>Maybe the title is 99% not understandable</p>
  
  <p>I have like that:</p>
  
  <pre><code>abc@5004428
  abcd@62604
  abcde@505779
  </code></pre>
  
  <p>But my file is larger than that.</p>
  
  <p>So, I want to remove the whole line that contain "abc" and "abcd" becase they are before @ and they are shorter than 5 or not equal characters.</p>
  
  <p>More explained: I want to remove the whole line which value before @ is shorter than or EQUAL to 5 characters.</p>
  
  <p>Any help would be appreciated.</p>
  
  <p>Thanks!</p>