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<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS Bin</title>
</head>
<body>
<div class="wrapper">
<div class="child-wrapper">
<div class="btn_box btn_one">hover me!</div>
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<div class="btn_box btn_three">hover me!</div>
</div>
<div class="child-wrapper">
<div class="btn_box btn_one btn_style_two">hover me!</div>
<div class="btn_box btn_two btn_style_three">hover me!</div>
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