title: Check if multiple strings exist in another string
body: <p>How can I check if any of the strings in an array exists in another string?</p>
  
  <p>Like:</p>
  
  <pre><code>a = ['a', 'b', 'c']
  str = "a123"
  if a in str:
    print "some of the strings found in str"
  else:
    print "no strings found in str"
  </code></pre>
  
  <p>That code doesn't work, it's just to show what I want to achieve.</p>