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<!DOCTYPE HTML>
<html>
<body style="background:white">
<div style="opacity:0.5; background:white; height:200px; padding:2px;"><button>Hello</button></div>
</body>
</html>
<!DOCTYPE HTML>
<html>
<body style="background:white">
<div style="opacity:0.5; background:white; height:200px; padding:2px;"><button>Hello</button></div>
</body>
</html>