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Test Info:

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<style>
#a { display: inline-block; height: 30px; }
#b { float: left; writing-mode: vertical-lr; border-top-style: solid; }
#c { float: left; height: 28px; }
</style>
</head>
<body>
<div id="a"><div id="b"><span id="c"></span></div></div>
</body>
</html>