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<html>
<body>
<div style="width: 100px; height: 100px; border: 10px solid blue; box-sizing: border-box;"></div>
</body>
</html>
<html>
<body>
<div style="width: 100px; height: 100px; border: 10px solid blue; box-sizing: border-box;"></div>
</body>
</html>