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<!DOCTYPE html> <html lang="en"> <head> <title>Bootstrap Case</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="/lib/bootstrap.min.css"> <script src="/lib/jquery-1.12.2.min.js"></script> <script src="/lib/bootstrap.min.js"></script> </head> <body> <div class="container"> <h2>Well Size</h2> <div class="well well-sm">Small Well</div> <div class="well">Normal Well</div> <div class="well well-lg">Large Well</div> </div> </body> </html>