Input (grade 13): If one had purchased the NES system in a bundle with the Power Pad, then Duck Hunt was included on a 3-in-1 cartridge that also included World Class Track Meet and Super Mario Bros..
Output (grade 10): If a player bought the NES system with the Power Pad, then Duck Hunt came on a 3-in-1 cartridge that also had World Class Track Meet and Super Mario Bros..