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Test Info:

<!DOCTYPE html>
<html>
<head>
<style>
td {
width: 20px;
height: 20px;
}
table {
border-collapse:separate;
border-spacing: 0px;
}
</style>
</head>
<body>
<table>
<col style="background: green"></col>
<col style="background: blue"></col>
<tr>
<td></td>
<td rowspan=2></td>
<tr>
<td colspan=2></td>
</tr>
</table>
</body>
</html>