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Test Info:

<!DOCTYPE html>
<html style="height: 600em; column-width: 1px;">
<head>
<style>p::first-letter { float:left; }</style>
</head>
<body onload="x=document.body.parentNode; x.style.columnWidth='111px'; x.offsetHeight; x.style.display='inline'; x.offsetHeight; "><p style="margin: -562949953421311em;">y
</p><p>'</p></body>
</html>