There are like a zillion combos you should be able to come up with on your own. Instead of hacking Viper into something that looks like this xxxxxV1P3rxxxxx I suggest you use a second word. example
whatever. Just dont become one of the millions of kiddies that uses any of the following.
Clutch, Snipes, tricks, Yolo, Beast, scopes, ITZ, noob, ect...