#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;
using ll = long long;

int main() {
    int n;
    cin >> n;

    vector<pair<string, string>> p(n);
    for (int i = 0; i < n; i++) {
        cin >> p[i].first >> p[i].second;
    }
    sort(p.begin(), p.end());

    for (int i = 0; i < n; i++) {
        cout << p[i].first << ' ' << p[i].second << endl;
    }

    return 0;
}