#include <bits/stdc++.h>
#include<iostream>
#include<map>
#include<vector>
#include <algorithm>
#include<math.h>
#include <iomanip>
#include<set>
#include <numeric>
#include<string>
using ll = long long;
using namespace std;

int main()
{
    ll n, m;
    cin >> n >> m;
    map<string, int> mp; 
    string s;
    int t;
    for (int i = 0; i < n; i++){
        cin >> s >> t;
        mp[s] = t;
    }
    for (int i = 0; i < m; i++){
        cin >> s >> t;
        mp[s] = t;
    }
    for (auto x :mp){
        cout << x.first << " " << x.second << endl;
    }
}