Bootstrap 3.0 - Grid System

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.min.css">
<div class='row'>
  <div class="col-xs-9">
      <br>Hifgdfgsdfg
    <br>Hifgdfgsdfg
    <br>Hifgdfgsdfg
    <br>Hifgdfgsdfg
    <br>  <br>Hifgdfgsdfg
    <br>Hifgdfgsdfg
    <br>Hifgdfgsdfg
    <br>Hifgdfgsdfg
    <br>  <br>Hifgdfgsdfg
 
  </div>
  <div class="col-xs-3">Hifgdfgsdfg
    <br>Hifgdfgsdfg
    <br>Hifgdfgsdfg
    <br>Hifgdfgsdfg
    <br>Hifgdfgsdfg
    <br>
  </div>
</div>

CSS

.row > div {
  background: lightgrey;
  border: 1px solid grey;
}