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<!DOCTYPE html>
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<html>
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<head>
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<script>
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function boom()
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{
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document.documentElement.style.display = "contents";
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document.designMode = 'on';
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document.documentElement.insertAdjacentHTML("beforeEnd", "<span><optgroup>");
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}
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</script>
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</head>
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<body onload="boom();"></body>
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</html>
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