                   <div class="button-1" id="submit">Submit</div>
                            <div class="button-1" id="delete">Delete</div>
                            <div class="button-1" id="reset">Reset</div>
                        </div>
                    </div>
                    <p class='text-center' id='invalidSet'></p>
                    <p>You may wish to use the visualization to verify some of the following <a href='https://cs.brown.edu/courses/cs022/static/files/documents/sets.pdf'>set id