How can I modify the below code so that I get only the parent `li` within the first `ul` and then with another variable get the sub `li` of the given sub `ul`?

```js
 $(function () {
  var vULSize = $("ul li").size();
  console.log(vULSize);
 });
```

```html
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<ul>
  <li>First</li>
  <li>Second
   <ul>
    <li>Second Sub 1</li>
    <li>Second Sub 2</li>
   </ul>
  </li>
  <li>Third</li>
  <li>Third
   <ul>
    <li>Third Sub 1</li>
    <li>Third Sub 2</li>
   </ul>
  </li>
 </ul>
```

Fiddle: <http://jsfiddle.net/0sp9pohr/>