title: Compare two columns in excel and delete the duplicate row
body: <p>I have below data in two columns in excel:</p>
  
  <pre><code>AB  CD
  
  EF  GH
  
  CD  AB
  
  GH  EF
  </code></pre>
  
  <p>If the values in column1 matches any cell in column2, the row should be deleted. Starting from cell A1, the duplicate value is found in B3 so 3rd row is deleted. Moving on to A2, the duplicate value is found in B4 so 4th row is deleted.</p>
  
  <p>Output should be </p>
  
  <pre><code>AB  CD
  
  EF  GH
  </code></pre>