title: remove lines that has duplicated words in begining before comma
body: <p>Welcome , </p>
  
  <p>here's the text file</p>
  
  <blockquote>
    <p>Soma, ID 6588, 1988</p>
    
    <p>Lara, ID 4652, 1995</p>
    
    <p>John, ID 1098, 1987</p>
    
    <p>Soma, ID 7898, 1998</p>
    
    <p>John, ID 1024, 1996</p>
  </blockquote>
  
  <p>i want to delete any line that starts with a duplicated word before the first comma .</p>
  
  <p>so the text will be :</p>
  
  <blockquote>
    <p>Soma, ID 6588, 1988</p>
    
    <p>Lara, ID 4652, 1995</p>
    
    <p>John, ID 1024, 1996</p>
  </blockquote>
  
  <p>the order is not necessary.</p>
  
  <p>any ideas ?</p>
  
  <p>using : notepad++ , vb.net .</p>