MOD = 998244353
N,K = map(int,input().split())
A = list(map(int,input().split()))
N2 = 1024
D = [0] * N2
Q = set()
for a in A:
    D[a] += 1
    Q.add(a)
if K > 10:
    print(0)
Q2 = set()
D2 = D[:]
D3 = [0] * N2
tmp = 1
for i in range(K-1):
    tmp *= (i+1)
    D3 = [0] * N2
    while Q:
        x = Q.pop()
        for j in range(1,N2):
            if x & j:
                continue
            D3[x | j] += D2[x] * D[j]
            D3[x | j] %= MOD
            Q2.add(x | j)
    D2 = D3
    Q,Q2 = Q2,Q

tmp *= K
ans = sum(D2) % MOD
ans *= pow(tmp,-1,MOD)
ans %= MOD
print(ans)