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<!DOCTYPE html>
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<html><body>
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There should be a blue block at the center of a black border.<br>
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<div style="border: solid 5px black; display: inline-block">
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<div style="float: left; margin: 50px; width: 50px; height: 50px; background-color: blue;">
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</div>
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</div>
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</body></html>
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