Bootstrap Buttons Button Tags

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<!DOCTYPE html>
<html>
<head>
    <title>Bootstrap Example</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>

    <h1>Buttons : Button tags</h1>
    
    <div class="container-fluid">
        <a class="btn btn-default" href="#" role="button">Link</a> 
        <button class="btn btn-default" type="submit">Button</button> 
        <input class="btn btn-default" type="button" value="Input"> 
        <input class="btn btn-default" type="submit" value="Submit">
    </div>
    
</body>
</html>
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