[Let her have her cynicism, George. It makes her life easier.]

Because they add up, you see? If it had been an ace and a ten, that would be a two-card Onion, and so forth. Groups of any three numbers are good, as are groups of suits. You know, ten terrapins, say.

[She's moving her hands a great deal, now, keeping them busy on the cards, even though it's not really necessary.]