#include <bits/stdc++.h>
using namespace std;
const long long MOD1 = 1000000007;
const long long MOD2 = 998244353;
typedef long long ll;
//typedef int ll;
typedef pair<ll, ll> P;
const long long INF = 1e9;
template <typename T>
void input_arr(vector<T>& A, ll N) {
	for (ll i = 0; i < N; i++) {
		cin >> A[i];
	}
}
template <typename T, typename Q>
void input_arr(vector<pair<T, Q>>& A, ll N) {
	for (ll i = 0; i < N; i++) {
		cin >> A[i].first >> A[i].second;
	}
}
template <typename T>
void input_arr(vector<vector<T>>& A, ll H, ll W) {
	for (ll i = 0; i < H; i++) {
		for (ll j = 0; j < W; j++) {
			cin >> A[i][j];
		}
	}
}
int main() {
    ll N, M; cin >> N >> M;
    vector<pair<string, ll>>A(N + M);
    input_arr(A, N + M);
    sort(A.begin(), A.end());
    for (ll i = 0; i < N + M; i++) {
        if (i + 1 < N + M && A[i].first == A[i + 1].first) {
            cout << A[i + 1].first << ' ' << A[i + 1].second << endl;
            i++;
        }
        else cout << A[i].first << ' ' << A[i].second << endl;
    }
}