title: i am stuck in one line return statement for this problem
body: <p>The highlight_word function changes the given word in a sentence to its upper-case version. For example, highlight_word("Have a nice day", "nice") returns "Have a NICE day". Can you write this function in just one line?</p>
  
  <pre><code>def highlight_word(sentence, word):
  return(___)
  
  print(highlight_word("Have a nice day", "nice"))
  print(highlight_word("Shhh, don't be so loud!", "loud"))
  print(highlight_word("Automating with Python is fun", "fun"))
  </code></pre>
  
  <p>can only write that line in the return statement nowhere else.</p>