title: strip(char) on a string
body: <p>I am trying to strip the characters '_ ' (underscore and space) away from my string. The first code fails to strip anything. </p>
  
  <p>The code for word_1 works just as I intend. Could anyone enlighten me how to modify the first code to get output 'ale'?</p>
  
  <pre><code>word = 'a_ _ le' 
  
  word.strip('_ ')
  
  word_1 = '_ _ le'
  word_1.strip('_ ')
  '''
  
  
  </code></pre>