<!DOCTYPE html>
<html>
<body>
Hello World!
</body>
</html><html>
<head>
<title>Hello World</title>
</head>
<body>
<h1>Welcome ! </h1>
<p>Hello World, We've come here to learn HTML</p>
</body>
</html><html>
<body>
<h6>Hello world</h6>
</body>
</html>