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<!DOCTYPE html>
<html>
<head>
<style>
body {
  /* Set "my-sec-counter" to 0 */
  counter-reset: my-sec-counter;
}
h2::before {
  /* Increment "my-sec-counter" by 1 */
  counter-increment: my-sec-counter;
  content: "Section " counter(my-sec-counter) ". ";
}
</style>
</head>
<body>
<h2>HTML Tutorial</h2>
<h2>CSS Tutorial</h2>
<h2>JavaScript Tutorial</h2>
<h2>Bootstrap Tutorial</h2>
<h2>SQL Tutorial</h2>
<h2>PHP Tutorial</h2>
</body>
</html>