What's the code to get 30 lives in the original Contra?

There was a code you entered into Contra for NES to get 30 extra lives. You entered it with the controller. What was it?


The Konami code:

B A Start

or for 2-player

B A Select Start

(technically, the "Start" and "Select, Start" are not part of the code, but are necessary to start the game)


The Konami code.