title: How to extract literal words from a consecutive string efficiently?
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/8870261/how-to-split-text-without-spaces-into-list-of-words">How to split text without spaces into list of words?</a>  </p>
  </blockquote>
  
  
  
  <p>There are masses of text information in people's comments which are parsed from html, but there are no delimiting characters in them. For example: <code>thumbgreenappleactiveassignmentweeklymetaphor</code>. Apparently, there are 'thumb', 'green', 'apple', etc. in the string. I also have a large dictionary to query whether the word is reasonable. 
  So, what's the fastest way to extract these words?</p>