"""

"""

import sys
from sys import stdin

def modfac(n, MOD):
 
    f = 1
    factorials = [1]
    for m in range(1, n + 1):
        f *= m
        f %= MOD
        factorials.append(f)
    inv = pow(f, MOD - 2, MOD)
    invs = [1] * (n + 1)
    invs[n] = inv
    for m in range(n, 1, -1):
        inv *= m
        inv %= MOD
        invs[m - 1] = inv
    return factorials, invs


def modnCr(n,r):
    return fac[n] * inv[n-r] * inv[r] % mod


N,M = map(int,stdin.readline().split())

A = [ M//N ] * N
rem = M - sum(A)

for i in range(rem):
    A[i] += 1

mod = 998244353
fac,inv = modfac(M+10,mod)

ans = 1


for i in A:

    ans *= modnCr(M , i)
    ans %= mod

    M -= i

print (ans)