Declarer might concede four tricks: one spade, one diamond and two clubs. He must eliminate a club loser. One chance is to find the suit splitting 3-3, but that happens only one time in three.

So that's groups of one, 12, four, seven, 24, and 60. That's the "system." Even the alien's buddies can't figure it out. Maybe they can wrap their heads around another number-- a dance number!