from math import comb

N,M = map(int,input().split())
A = list(map(int,input().split()))
A.sort()

mod = 998244353

dp = [0]*(M+1)
dp[0]=1

for i in range(M+1):
    for a in A:
        if i-a>=0:dp[i]|=dp[i-a]

ans=1
for i in range(M+1):
    if i==0:continue
    if dp[i]==1:
        ans+=comb(M-1,i-1)%mod

print(ans%mod)