Sure, I've got one. Numbers.
5 seconds sound clip from the Bullets or Ballots (1939) classic radio play.
You can hear this line at 00:30:02 in the radio play.
Quote context
[...]
- Sure. And meanwhile, we sit back and wind up broke.
- Just pull them right out of the hat, huh?
- No, you just go to work. Quit playing cops and robbers. Stop knighting each other.
- I suppose you've got a good racket in mind? Well, name it.
- Sure, I've got one. Numbers.
- Now, what's the odds against picking the right number out of... from one to a thousand?
- That's it. Now, we take the last three numbers of the racetrack pay off every day.
- The suckers try to guess it.
[...]