#include <bits/stdc++.h>
using namespace std;
using lint = long long;
template<class T = int> using V = vector<T>;
template<class T = int> using VV = V< V<T> >;

int main() {
  cin.tie(nullptr); ios::sync_with_stdio(false);
  int n; cin >> n;
  V< pair<string, string> > s(n);
  for (int i = 0; i < n; ++i) {
    string tl, tr; cin >> tl >> tr;
    s[i] = {tl, tr};
  }
  sort(begin(s), end(s));
  for (int i = 0; i < n; ++i) {
    cout << s[i].first << ' ' << s[i].second << '\n';
  }
}