title: python regex-only one vowel, but no other vowels
body: <p>given the string below, </p>
  
  <pre><code>sentences = "He is a student. She is a teacher. They're students, indeed. Babies sleep much. Tell me the truth. Bell--push it!"
  </code></pre>
  
  <p>how can i print the words in the "sentences" that contain only one "e", but no other vowels?
  so, basically, i want the following:</p>
  
  <p>He She Tell me the</p>
  
  <p>my code below does not give me what i want:</p>
  
  <pre><code>for word in sentences.split():
      if re.search(r"\b[^AEIOUaeiou]*[Ee][^AEIOUaeiou]*\b", word):
          print word 
  </code></pre>
  
  <p>any suggestions?</p>