from math import gcd
N, M = map(int, input().split())
P = [i for i in range(N)]
for _ in range(M):
    L, *T = list(map(int, input().split()))
    sigma = []
    for t in T:
        sigma.append(P[t-1])
    for i in range(L):
        if i < L-1:
            j = T[i+1]-1
        else:
            j = T[0]-1
        P[j] = sigma[i]
seen = [False]*N
ans = 1
MOD = 998244353
for i in range(N):
    if seen[i]:
        continue
    tmp = 1
    seen[i] = True
    next = P[i]
    while not seen[next]:
        seen[next] = True
        tmp += 1
        next = P[next]
    ans = (ans*tmp//gcd(ans, tmp)) % MOD
print(ans)