#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef pair<int, int> PII;
 
const int MAX_N = 5e5+5;
 
int n;
PII a[MAX_N];
 
bool czy_przecinaja(int i, int j) {
	PII x = a[i];
	PII y = a[j];
 
    if (x.first < y.first && y.first < x.second && x.second < y.second) return true;
    if (y.first < x.first && x.first < y.second && y.second < x.second) return true;
 
    return false;
}
 
PII czy_dwa_przecinajaca(int doPominiecia) {
    for (int i = 0; i < n-2; i++) {
        for (int j = 0; j < n-2; j++) {
            if (i == j || i == doPominiecia || j == doPominiecia) continue;
 
            if (czy_przecinaja(i, j)) return make_pair(i, j);
        }
    }
 
    return make_pair(-1, -1);
}
 
void solve() {
	cin >> n;
    for (int i = 0; i < n-2; i++) {
        cin >> a[i].first >> a[i].second;
    }
 
    PII tmp = czy_dwa_przecinajaca(-1);
 
    int K1 = tmp.first;
    int K2 = tmp.second;
 
    if (czy_dwa_przecinajaca(K1).first == -1) {
        cout << a[K1].first << ' ' << a[K1].second << '\n';
        return;
    }
 
    cout << a[K2].first << ' ' << a[K2].second << '\n';
}
 
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
 
    int T;
    cin >> T;
 
    for (int i = 0; i < T; i++) {
        solve();
    }
 
    return 0;
}
 

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