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<head>
<style>
div {
width: 50px;
height: 100px;
background-color: rgba(0,0,255,0.5);
}
</style>
</head>
<body>
<div/>
</body>
</html>
<head>
<style>
div {
width: 50px;
height: 100px;
background-color: rgba(0,0,255,0.5);
}
</style>
</head>
<body>
<div/>
</body>
</html>