from operator import mul
from functools import reduce
def cmb(n,r):
    r = min(n-r,r)
    if r == 0: return 1
    over = reduce(mul, range(n, n - r, -1))
    under = reduce(mul, range(1,r + 1))
    return over // under
n=int(input())
m=int(input())
n//=1000
n%=m
print(cmb(m,n)%(10**9))