td id="cell1">solid</td>
                <td>solid</td>
            </tr>
            <tr>
                <td id="cell2">solid</td>
                <td id="cell3">ridge</td>
                <td id="cell4">solid</td>
            </tr>
            <tr>
                <td>solid</td>
                <td id="cell5">solid</td>
                <td>solid</td>
            </tr>
        </table>
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</html>