bootstrap 4 cdn
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bootstrap 4 cdn
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
bootstrap 4 cdn
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bootstrap 4 cdn
<html>
<head>
<meta charset="UTF-8">
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<body>
<h1>Hello Bootstrap</h1>
<script src="https://code.jquery.com/jquery-3.4.1.slim.min.js"
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