ass="btn btn-primary">2</button>
                  <button type="button" class="btn btn-primary">3</button>
                  <button type="button" class="btn btn-primary">4</button>
                </div>
                <div class="input-group">
                  <div class="input-group-text" id="btnGroupAddon2">@</div>
                  <input type="text" class="form-control" placeholder="Input group example" aria-label="Input group example" aria-describedby="btnGroupAddon2">
                </div>
     