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<title>Filter sanity-check</title>
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html, body { margin: 0; background: white; height: 100%; width: 100%; }
body { position: relative; }
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<div style="position: absolute; top: 50px; left: 10px; width: 100px; height: 10px; background: black"></div>
<div style="position: absolute; top: 70px; left: 10px; width: 94px; height: 4px; border: 3px solid #000;"></div>
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