input: [Category] Performance data [Purpose] This is the user-defined variable cookie. Developers can segment visitors by custom variables by calling a native JavaScript method. [1st party or 3rd party?] 3rd party [Lifespan] This new variable gets stored in a persistent cookie which expires in two years. [Cookie Name/ID] 
output: __utmv
options: _ _ u t m a
options: _ _ u t m b
options: _ _ u t m c
options: _ _ u t m z
options: _ _ u t m v
options: f o r u m _ c o o k i e _ A B C D