#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <cmath>
#include <vector>
#include <set>
#include <map>
#include <stack>
#include <unordered_set>
#include <unordered_map>
#include <queue>
#include <ctime>
#include <cassert>
#include <complex>
#include <string>
#include <cstring>
#include <chrono>
#include <random>
#include <bitset>
#include <array>

using namespace std;

typedef long long ll;
typedef long double ld;

const int N = 100 + 5;
const int OO = 1e9 + 5;

int n;
vector<string> meals[N];

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    cin >> n;
    for (int i = 0; i < n; ++i) {
        int count;
        cin >> count;
        while (count--) {
            string dish;
            cin >> dish;
            meals[i].push_back(dish);
        }
    }
    cout << meals[0].size();
    for (auto &i : meals[0]) {
        cout << '\n' << i;
    }
    cout << '\n';
    return 0;
}