<button type="button" class="btn btn-primary">Button 1</button>
<button type="button" class="btn btn-secondary">Button 2</button>
<button type="button" class="btn btn-success">Button 3</button>
<button type="button" class="btn btn-danger">Button 4</button>
<button type="button" class="btn btn-warning">Button 5</button>
<button type="button" class="btn btn-info">Button 6</button>
<button type="button" class="btn btn-light">Button 7</button>
<button type="button" class="btn btn-dark">Button 8</button>
<button type="button" class="btn btn-link">Button 9</button>