A man came to the desk to get a replacement card. He saw my stack of cards and asked if he could look through them and find a "good number." I said ok, and he looked through the stack. Fortunately, the one with the "good number" was the fifth one he considered. It was a "good number" because it had a 1947 in it, the year he was born. He said- you're probably thinking- this old man has nothing to do other than to find the ideal card number.