title: haskell - turning list of lists into one list
body: <p>If I have a list of lists, say <code>[[1,2,3],[1,2,3],[1,2,3]]</code>, is there any way in Haskell to turn this into just 1 list, like <code>[1,2,3,1,2,3,1,2,3]</code>?</p>
  
  <p>Thanks in advance!</p>