               <button type="button" class="btn btn-block btn-outline-dark btn-sm">Dark</button>
                    </td>
                    <td>
                      <button type="button" class="btn btn-block btn-outline-dark btn-xs">Dark</button>
                    </td>
                    <td>
                      <button type="button" class="btn btn-block btn-outline-dark btn-flat">Dark</button>
                    </td>
                    <td>
                      <button type="button" class="b