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Test Info:

<html>
<head>
<style>
#colset {
column-count: 3;
}
.a {
height: 3in;
}
.b {
height: 24pt;
}
.c {
height: 336pt;
}
.d {
position: absolute;
}
</style>
</head>
<body onload="document.getElementById('a').className = '';">
<div id="colset"><div><div class="a" id="a"></div><div class="b"><div class="c"></div><div class="d"></div></div></div></div>
</body>
</html>