#include<iostream>
#include<algorithm>
#include<string>

using namespace std;

void solve1(){
	string a, b;
	int Pa, Pb;
	string Xa, Xb;
	cin >> a >> Pa >> Xa;
	cin >> b >> Pb >> Xb;

	
	if (Pa == Pb)
		cout << "-1" << endl;
	if (Pa > Pb)
		cout << a << endl;
	else
		cout << b << endl;
		
}


int main(){
	solve1();
	return 0;
}