title: Read two file and print browser
body: <p>There are two files in the form <code>file1.txt</code> and <code>file2.txt</code>.<br>
  <code>file1.txt</code> contains string <code>Hello</code> and <code>file2.txt</code> contains string <code>World!</code>.<br>
  I read these files in order and read <code>Hello World!</code>. I want to print this in a browser. I could not test with pipe. Could you help?</p>