## https://yukicoder.me/problems/no/2141

MOD = 998244353

def main():
    N, M = map(int, input().split())

    answer1 = 1
    for i in range(1, M + 1):
        answer1 *= i
        answer1 %= MOD
    

    a1 = M // N
    a2 = M - a1 * N
    
    # a1 + 1個 a2個の箱に入れる.のこりのN - a2箱はa1個の箱に入れる

    answer2 = 1
    for i in range(1, a1 + 1):
        answer2 *= i
        answer2 %= MOD

    answer3 = (answer2 * (a1 + 1)) % MOD

    if a2 == 0:
        answer4 = pow(answer2, M, MOD)
    else:
        answer4 = (pow(answer2, N - a2, MOD) * pow(answer3, a2, MOD)) % MOD
    
    answer = (answer1 * pow(answer4, MOD - 2, MOD)) % MOD
    print(answer)






if __name__ == '__main__':
    main()