title: Haskell filter string with only the first occuring Char
body: <p>I want to filter a string with a string.
  What I want is to use delete every first occurring char.</p>
  
  <pre><code>myFunc :: String -&gt; String -&gt; String
  </code></pre>
  
  <p>Like: </p>
  
  <pre><code>myFunc "dddog" "bigdddddog" = "biddg"
  </code></pre>
  
  <p>In <code>"dddog"</code>: 3x d, 1x o, 1x g</p>
  
  <p>In the second string it removed 3x d, 1x o and 1x g
  So the output: <code>biddg</code></p>
  
  <p>I can't use filter for it, because it will delete all occurring chars.
  And I struggled a long time with it.</p>
  
  <p>Thanks in advance:)</p>