<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!DOCTYPE html><html class=''>
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<style class="cp-pen-styles">
.button {
margin: .4em;
padding: 1em;
cursor: pointer;
background: #ececec;
text-decoration: none;
color: #666;
}
.grow {
display: inline-block;
transition-duration: 0.3s;
