title: How to use java regex to match a line
body: <p>The raw data is:</p>
  
  <pre><code>auser1 home1b
  auser2 home2b
  auser3 home3b
  </code></pre>
  
  <p>I want to match a line, but it doesn't work using <code>^(.*?)$</code></p>
  
  <p>However, I can use <code>a(.*?)b</code> to match <code>user1 home1</code>.</p>
  
  <p>How can I match <code>auser1 home1b</code></p>