title: Sentence that uses every base64 character
body: <p>I am trying to construct a sentence/letter combination that will return every base64 character, but failing to find a word for purposes of unit testing.</p>
  
  <p>The unit tests I have so far are failing to hit the lines that handle the + and / characters. While I can sling a them at the encoder/decoder directly it would be nice to have a human readable source (the base64 equivalent of 'the quick brown dog').</p>