#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

int main()
{
    int n, m;
    cin >> n >> m;
    vector<int> a(n);
    rep(i,n) a[i] = i;
    rep(i,m){
        int t;
        cin >> t;
        vector<int> b(t);
        rep(j,t){
            cin >> b[j];
            --b[j]; 
        } 
        reverse(b.begin(),b.end());
        rep(j,t-1){
            swap(a[b[j]], a[b[j+1]]);
        }
    }
    scc_graph g(n);
    rep(i,n){
        g.add_edge(i, a[i]);
    }
    dbg(a);
    auto res = g.scc();
    map<int, int> mp;
    for(auto vs : res){
        int v = vs.size();
        for(int r=2;r*r<=v;r++){
            if(v%r==0){
                int cnt = 0;
                while(v%r==0) {
                    v /=r;
                    cnt++;
                }
                mp[r] = max(mp[r], cnt);
            }
        }
        if(v!=1){
            mp[v] = max(mp[v], 1);
        }
    }
    mint ans = 1;
    for(auto p : mp){
        ans *= mint(p.first).pow(p.second);
    }
    cout << ans.val() << endl;
    return 0;
}