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<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="../lib/w3.css">
<body>

<div class="w3-margin-12 w3-container w3-margin-12 w3-teal">
  <p>The w3-margin-12 class adds a 12px margin to an element.</p>
</div>

</body>

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</html>