#include <bits/stdc++.h>

using namespace std;

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

    int T;
    cin >> T;

    while(T--) {
        int n;
        cin >> n;

        vector<int> len(n);
        vector<vector<pair<int, int> > > pos(101);
        for(int i = 0; i < n; ++i) {
            cin >> len[i];
            for(int j = 0; j < len[i]; ++j) {
                int t, p;
                cin >> t >> p;
                pos[t].emplace_back(p, i);
            }
        }

        set<int> infect = { 0 };
        for(int i = 1; i <= 100; ++i) {
            vector<bool> mark(11);
            for(auto o : pos[i]) {
                if(infect.count(o.second)) {
                    mark[o.first] = true;    
                }
            }    
            for(auto o : pos[i]) {
                if(mark[o.first]) {
                    infect.emplace(o.second);
                }
            }
        }

        vector<int> ans;
        for(int i : infect) {
            ans.emplace_back(i);
        }

        int m = ans.size();
        for(int i = 0; i < m; ++i) {
            cout << ans[i] + 1 << " \n"[i == m - 1];
        }
    }

    return 0;
}