#include <algorithm>
#include <iostream>
#include <iomanip>
#include <cstring>
#include <string>
#include <vector>
#include <random>
#include <bitset>
#include <queue>
#include <cmath>
#include <stack>
#include <set>
#include <map>
using namespace std;
typedef pair<string, string> P;

int i,n;
string s,d;
P p[55];

int main() {
    cin >> n;
    for (; i < n; i++) {
        cin >> s >> d;
        p[i] = P(s, d);
    }

    sort(p, p + n);

    for (i = 0; i < n; i++) {
        cout << p[i].first << " " << p[i].second << "\n";
    }

    return 0;
}