Problems
Party
Party
In how many ways can we choose among n students exactly k of them, who will get yogurt? Print the answer modulo 9929.
Input data
Two integers n and k (0 ≤ k ≤ n ≤ 500).
Output data
Print the number of ways modulo 9929.
Examples
Input example #1
6 3
Output example #1
20
Input example #2
7 1
Output example #2
7