#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using ll = long long;
#define rep(i,n) for(int i=0;i<(int)(n);i++)

int main(){
	int n,m;
	cin>>n>>m;
	vector<int> v(n);
	rep(i,n) v.at(i)=i;
	rep(i,m){
		int t;
		cin>>t;
		vector<int> s(t);
		rep(i,t) cin>>s.at(i),s.at(i)--;
		vector<int> nv(n,-1);
		rep(i,t){
			nv.at(s.at((i+1)%t))=v.at(s.at(i));
		}
		rep(i,n) if(nv.at(i)==-1) nv.at(i)=v.at(i);
		swap(nv,v);
	}
	atcoder::dsu uf(n);
	rep(i,n) uf.merge(i,v.at(i));
	map<int,ll> mp;
	rep(i,n) mp[uf.leader(i)]++;
	ll ans=1;
	for(auto[i,sz]:mp){
		ans=ans*sz/gcd(ans,sz);
	}
	cout<<ans%998244353<<endl;
}