title: Haskell counting words containing specific characters in strings
body: <p>is it possible to get the number of words which contain a specific character from a string ? </p>
  
  <p>for example: string = "yes no maybe"</p>
  
  <p>it would return 2 if the specific character was 'e'.</p>
  
  <p>I have been trying for hours :(</p>
  
  <p>thanks</p>