Jeff is playing a new video game. The goal is to explore a cave with many levels and collect gold coins. In order to get through a door to the next level, you must master a secret code. Jeff’s video character has four pockets on his jacket. The top left pocket is marked 3/6, the top right pocket is marked 5/15, the lower left pocket is marked 8/12 and the lower right pocket is marked 9/12.