<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
#point:after{
content:"\001B1";
}
</style>
</head>
<body>
<p>UPSILON using Hexa Decimal: Ʊ</p>
<p>UPSILON using HTML Code: Ʊ</p>
<p id="point">UPSILON using CSS Entity: </p>
</body>
</html>