N, K = map(int, input().split())
A = [0 for i in range(N)]
for i in range(K):
   L, S, *B = map(int, input().split())
   B = [x-1 for x in B]
   for x in B:
      A[x] |= S
print(sum(A) * 499122177 % 998244353)