#include <bits/stdc++.h>
using namespace std;
using ll  = long long;
template<class T>
using vec = vector<T>;
template<class T, size_t S>
using arr = array<T, S>;
int main(){
	vec<ll> A, S;
	ll N, M, T;
	set<ll> L;
	cin >> N >> M;
	for (ll n = 0; n <= N; n++) A.emplace_back(n);
	for (ll m = 0; m < M; m++) {
		cin >> T;
		S.resize(T);
		for (ll t = 0; t < T; t++) cin >> S[t];
		S.emplace_back(0);
		for (ll t = T - 1; t >= 0; t--) A[S[t + 1]] = A[S[t]];
		A[S[0]] = A[0];
	}
	for (ll n = 1; n <= N; n++) if (A[n] != n) {
		ll now = n, d = 1, next;
		while (A[now] != n) {
			d++;
			next = A[now];
			A[now] = now;
			now = next;
		}
		A[now] = now;
		L.emplace(d);
	}
	vec<bool> P(1001, true);
	P[0] = P[1] = false;
	for (ll n = 2; n <= 1000; n++) if (P[n]) for (ll t = 2 * n; t <= 1000; t += n) P[t] = false;
	map<ll, ll> ans_fac;
	for (auto e : L) {
		ll rt = sqrt(e);
		map<ll, ll> fac;
		for (ll p = 2; p < rt; p++) if (P[p]) while (e % p == 0) fac[p]++, e /= p;
		fac[e]++;
		for (auto& i : fac) if (ans_fac[i.first] < i.second) ans_fac[i.first] = i.second;
	}
	ll ans = 1;
	for (auto e : ans_fac) for (ll i = 0; i < e.second; i++) ans = (ans * e.first) % 998244353;
	cout << ans << endl;
	return 0;
}