title: Random permutation of letters
body: <p>I have cities: A, B, C, D, E</p>
  
  <p>How can I generate an initial solution in Java that contains all of these elements once? For example: BCDAE</p>
  
  <p>Currently I'm generating a solution in order ABCDE then mixing it up, is there an easier way to do this I'm just not thinking of?</p>