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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Paste Code Example</title>
    <style>
        body { font-family: sans-serif; text-align: center; margin-top: 50px; }
        button { padding: 10px 20px; font-size: 16px; cursor: pointer; }
    </style>
</head>
<body>

    <h1 id="demo">Hello World!</h1>
    <button onclick="changeText()">Click Me</button>

    <script>
        function changeText() {
            document.getElementById("demo").innerHTML = "Text Changed!";
        }
    </script>

</body>
</html>
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