        <h4>With icons</h4>

              <div class="input-group">
                <span class="input-group-addon"><i class="fa fa-envelope"></i></span>
                <input type="email" class="form-control" placeholder="Email">
              </div>
              <br>

              <div class="input-group">
                <input type="text" class="form-control">
                <span class="input-group-addon"><i class="fa fa-check"></i></span>
              </div>
              <br>

              <di