<!DOCTYPE html>
<html>
<head>
<title>ページのタイトル</title>
</head>
<body>

<h1>見出し</h1>
<h2>見出し</h2>
<h3>見出し</h3>
<h4>見出し</h4>
<h5>見出し</h5>
<h6>見出し</h6>
  
</body>
</html>

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External JavaScript

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