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#include <bits/stdc++.h>
using namespace std;
unordered_map<string, int> id;
vector<int> G[100010];
vector<vector<int>> ans;
bool vis[100010];
int main(void) {
    ios::sync_with_stdio(false);
    int N;
    cin >> N;
    vector<string> names(N);
    int cc = N;
    for (int i = 0; i < N; ++ i) {
        cin >> names[i];
        int n;
        cin >> n;
        for (int j = 0; j < n; ++ j) {
            string email;
            cin >> email;
            email = email.substr(0, email.find('@'));
            if (id.find(email) == end(id)) id[email] = cc ++;
            G[i].push_back(id[email]);
            G[id[email]].push_back(i);
        }
    }
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