title: unable to append using if statement
body: <p>I have three lists. I would like to append the list object onto the 'filtered' list if the object contains "HP" or "LP." The output places all items of filenames onto 'filtered' instead. Unsure why this is occurring. Your insight would be appreciated!</p>
  
  <pre><code>filenames = ['HP PLEAS 56s Jazz.wav', 'HP PLEAS 57s groupLaughing.wav', 'HP 
  PLEAS 57s Guitar_2.wav', 'PLEAS 56s Jazz.wav']
  filtered = []
  original = []
  
  for x in filenames:
      if "LP" or "HP" in x:
          filtered.append(x)
      else:
          original.append(x)
  </code></pre>