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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="Content-Style-Type" content="text/css">
<style type="text/css">
body > span { outline: 1px dotted black; }
body > span > span { display: block; width: 10em; }
</style>
</head>
<body>
<span><span>A</span><span>A</span></span>
</body>
</html>