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<td style="width: 20%; border: 1px solid black; padding: 0;">Test 1</td>
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<td style="border: 1px solid black; padding: 0;">Test 2.1</td>
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<td style="width: 20%; border: 1px solid black; padding: 0;">Test 2.2.1</td>
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<td style="border: 1px solid black; padding: 0;" colspan="3">Test 2.2.3</td>
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<td style="border: 1px solid black; padding: 0;">Test 2.2.2.1</td>
<td style="border: 1px solid black; padding: 0;">Test 2.2.2.2</td>
<td style="border: 1px solid black; padding: 0;">Test 2.2.2.3</td>
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