<table style="border-collapse:collapse;font-family:sans-serif;font-size:1em">
<thead>
<tr><th style="border-top:0.08em solid black;border-bottom:0.05em solid black;; text-align:right">A</th> <th style="border-top:0.08em solid black;border-bottom:0.05em solid black;; text-align:right">B</th></tr>
</thead>
<tbody>
<tr><td style="text-align:right">1</td> <td style="text-align:right">3</td></tr>
<tr><td style="border-bottom:0.08em solid black;; text-align:right">2</td> <td style="border-bottom:0.08em solid black;; text-align:right">4</td></tr>
</tbody>
<tfoot>
<tr><td colspan="2" style="text-align:left"><i><span style="color:blue">Source: data</span></i></td></tr>
</tfoot>
</table>