#include <bits/stdc++.h>
using namespace std;
#define L for (int i = 0; i < n; i++)
using s=string;int main() {int n;cin >> n;vector<s> a(n);s t, u;L cin >> t >> u, a[i] = t + " " + u;sort(a.begin(), a.end());L cout << a[i] << endl;return 0;}