<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css"
integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<h1>Bootstrap CDN 3.3 Link</h1>
<div class="alert alert-success" role="alert">Alert Success</div>
<div class="alert alert-info" role="alert">Alert Info</div>
<div class="alert alert-warning" role="alert">Alert Warning</div>
<div class="alert alert-danger" role="alert">Alert Danfer</div>
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integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa"
crossorigin="anonymous"></script>