input: [Description] Keeps track of where the visitor came from, what search engine they used, what link was clicked on, what keyword they used, and where in the world they are when they accessed the website. [Cookie Name] 
output: __utmz
options: _ _ u t m a
options: _ _ u t m b
options: _ _ u t m c
options: _ _ u t m v
options: _ _ u t m x
options: _ _ u t m z