title: Checking charcters in a string and outputing a Single message
body: <pre><code>a_lst = ['chair','gum','food','pizza']
  letter = 'x'
  for word in a_lst:
    if letter not in word:
      print ('no',letter)
  
    elif letter in word:
      print ('yes',letter)   
  </code></pre>
  
  <p>Output:</p>
  
  <pre><code>no x
  no x
  no x
  no x
  </code></pre>
  
  <p>Is there a way i can iterate though each item in "a_lst", check if each item has letter 'x'.  if no item has letter 'x' print 'no x' just Once. If a word contains letter 'x', print 'yes x' just Once.</p>
  
  <p>I think my logic is flawed somewhere.</p>
  
  <p>Any suggestions?</p>
  
  <p>Thanks</p>