<!DOCTYPE html>

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Copyright 2015 Google Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
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     http://www.apache.org/licenses/LICENSE-2.0

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<html>

<head>
    <title>Hello, world</title>
    <link rel="stylesheet" href="/style.css">
    <script src="/script.js"></script>
</head>

<body>
    <h1>Hello, world</h1>

    <button onclick="fetchMessage()">Fetch Message</button>
    <p id="message">Click on the button to fetch the message.</p>
</body>

</html>