<table border=2>
<tr>
    <td width=205 height=100>
    <center><b>A1</b></center>
    </td>
    <td width=205 height=100>
    <center><b>B1</b></center>
    </td>
</tr>
<tr>
    <td width=205 height=100>
    <table>
    <td></td>
    </table>
    </td>
    <td width=205 height=100>
    <table>
    <td></td>
    </table>
    </td>
</tr>
</table>

<table border=1>
<td width=100 heighT=100>
<table border=1>
<td width=100 heighT=100>
<center><b>A2</b></center>
</td>
</table>
</td>
<td width=100 heighT=100>
<table border=1>
<td width=100 heighT=100>
<center><b>B2</b></center>
</td>
</table>
</td>
<td width=100 heighT=100>
<table border=1>
<td width=100 heighT=100>
<center><b>A2</b></center>
</td>
</table>
</td>
<td width=100 heighT=100>
<table border=1>
<td width=100 heighT=100>
<center><b>A2</b></center>
</td>
</table>
</td>
</table>
<table border=1>
<tr>
    <td width=205 height=100>
    <table>
    <td></td>
    </table>
    </td>
    <td width=205 height=100>
    <table>
    <td></td>
    </table>
    </td>
</tr>
</table>