.col-md-9 .col-md-push-3</div>
  <div class="col-md-3 col-md-pull-9">.col-md-3 .col-md-pull-9</div>
</div>
{% endhighlight %}

  <h2 id="grid-less">Less mixins and variables</h2>
  <p>In addition to <a href="#grid-example-basic">prebuilt grid classes</a> for fast layouts, Bootstrap includes Less variables and mixins for quickly generating your own simple, semantic layouts.</p>

  <h3>Variables</h3>
  <p>Variables determine the number of columns, the gutter width, and the media query point at which to begin 