#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;

int N, M;
map<string, int> A, ans;


int main() {
  cin >> N >> M;
  for (int i = 0; i < N; i++) {
    string s;
    int a;
    cin >> s >> a;
    A[s] = a;
  }
  for (int i = 0; i < M; i++) {
    string s;
    int a;
    cin >> s >> a;
    A[s] = a;
  }
  for (auto p: A) {
    cout << p.first << ' ' << p.second << endl;
  }
  return 0;
}