title: Need help in the Regular Expression start with string with space
body: <p>I want the string start with "shivam " (without quote).my regular expression is :<code>(?=shivam\s)\w+</code>
  but they are not matching space after shivam what do i do?</p>
  
  <p>Input is: </p>
  
  <pre><code>shivam gupta
  </code></pre>
  
  <p>Expected output is: </p>
  
  <pre><code>gupta
  </code></pre>
  
  <p>Without any space both side. My output is <code>shivam gupta</code>.</p>