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<html lang="en"><head> <title>Bootstrap Example</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css"> <script src="https://cdn.jsdelivr.net/npm/jquery@3.7.1/dist/jquery.slim.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.1/dist/umd/popper.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/js/bootstrap.bundle.min.js"></script></head><body><div class="container mt-3"> <h3>Input Groups</h3> <p>The .input-group class is a container to enhance an input by adding an icon, text or a button in front (.input-group-prepend) or behind (.input-group-append) the input field as a "help text".</p> <p>Use the .input-group-text class to style the specified help text.</p> <form action="/action_page.php"> <div class="input-group mb-3"> <div class="input-group-prepend"> <span class="input-group-text">@</span> </div> <input type="text" class="form-control" placeholder="Username" id="usr" name="username"> </div> <div class="input-group mb-3">