title: Delete entries from CSV from second CSV file
body: <p>I am trying to delete entries found in first.csv from second.csv</p>
  <p>My first.csv looks like that:</p>
  <pre><code>surname,lastname,,,website-link,country,None,city,,,email,,,phonenumber,,,,
  </code></pre>
  <p>My second.csv contains only email-adresses. So I want to delete all matching emails in first.csv.</p>
  <p>Example:</p>
  <p>first.csv:</p>
  <pre><code>mike,pence,,,www.google.de,germany,None,Berlin,,,mike@pence.de,,,01769921323,,,,
  frank,schwarz,,,www.bund.de,germany,None,München,,,frank@google.de,,,01469425323,,,,
  </code></pre>
  <p>second.csv:</p>
  <pre><code>frank@google.de
  </code></pre>
  <p>Output (first.csv) should be:</p>
  <pre><code>mike,pence,,,www.google.de,germany,None,Berlin,,,mike@pence.de,,,01769921323,,,,
  </code></pre>
  <p>Can I achieve that via mac terminal?</p>