#include <stdio.h>
#include <cstring>
#include <fstream>

using namespace std;

int main()
{
	int* students = new int[524289];

	memset( students, 0, sizeof(int)*524289);

	ifstream in("exam.in");

	int N,M;
	in >> N >> M;
	for(int i = 0; i < N; i++){
		int F,V;
		in >> F >> V;
		students[F] += V;
	}
	for(int i = 0; i < M; i++){
		int F,V;
		in >> F >> V;
		students[F] += V;
	}

	ofstream out("exam.out");
	for(int i = 0; i < 524289;i++){
		if ( students[i] > 113 ){
			out << i << std::endl;
		}
	}



	return 0;
}