#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
#include <queue>
#include <map>
#include <cmath>
#include <iomanip>
#include <set>
#include <cstdio>
#include <string>

using namespace std;

int main() {
  int n, m;
  cin >> n >> m;
  map<string, int> mp;
  for (int i = 0; i < n; i++) {
    string s;
    int r;
    cin >> s >> r;
    mp[s] = r;
  }
  for (int i = 0; i < m; i++) {
    string s;
    int r;
    cin >> s >> r;
    mp[s] = r;
  }
  vector<pair<string, int> > p;
  for (auto i : mp) {
    p.push_back(make_pair(i.first, i.second));
  }
  sort(p.begin(), p.end());
  for (int i = 0; i < p.size(); i++) {
    cout << p[i].first << " " << p[i].second << endl;
  }
  return 0;
}