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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
</head>
<body>
<script type="text/coffeescript">
$ ->
callback = (response) -> alert response.ip
$.get "https://ipinfo.io", callback, 'json'
</script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/coffee-script/1.7.1/coffee-script.min.js"></script>
<h1 id="header" style="color:black"></h1>
</body>
</html>
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