s="control-label" for="inputError">Input with error</label>
                <input type="text" class="form-control" id="inputError">
              </div>
            </form>

            <h1>Input Groups</h1>

            <form role="form">
              <div class="form-group input-group">
                <span class="input-group-addon">@</span>
                <input type="text" class="form-control" placeholder="Username">
              </div>
              <div class="form-group input-group">
           