title: What are the type of Strings generated by (a*+b*)
body: <p>Besides strings of any number of a's and b's like aa.. or bb..  ,Would regular expression (a*+b*) contain a string like </p>
  
  <blockquote>
    <p>ab</p>
  </blockquote>
  
  <p>or any string ending with b ?</p>
  
  <p>Is (a*+b*) same as (a* b*) ?</p>
  
  <p>I am a little bit confuse about the strings generated by regular expression (a*+b*) and would really appreciate if someone can help.</p>