## Description:

Wikipedia says: A twin prime is a prime number that differs from another prime number by two. Except for

the pair (2, 3), this is the smallest possible difference between two primes. Some examples of twin prime

pairs are (3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43),…

Write a program that generates the first 15 pairs of twin primes, beginning with (3,5). Display the pairs in

reverse order, so the last pair to be displayed will be (3,5).

## Input:

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## Output:

Display each pair of values on a separate line, surrounded by parentheses and separated by a comma.

Examples are:

(17,19)

(11,13)

1386 H_PRC3

## Note:

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本题由旧版NOJ导入，来源：Internet