<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <style type="text/css"> div { width: 1em; } </style>
  </head>
  <body lang="km">
    <div>aaaaaaaaaa&#x17D8;bbbbbbbbbb</div>
    <div>aaaaaaaaaa&#x17DA;bbbbbbbbbb</div>
  </body>
</html>