               <div class="form-group">
                            <label class="col-sm-3" for="masked">Masked Input:</label>

                            <div class="col-sm-9">
                                <input class="form-control" id="masked" name="masked" ui-mask="{{y}}" ng-model="x" placeholder="Write a mask or click a button" ui-mask-placeholder>
                                <span class="help-inline">
                                    <div ng-show="x.length">Model value: <code>{{x}}</code></