Jane is 25 years old. Dick is older than Jane. In \(n\) years, where \(n\) is a positive integer, Dick's age and Jane's age will both be two-digit number and will have the property that Jane's age is obtained by interchanging the digits of Dick's age. Let \(d\) be Dick's present age. How many ordered pairs of positive integers \((d,n)\) are possible?

(第二十届AIME1 2002 第3题)