#include<iostream>
#include <math.h>
#include <string>
using namespace std;

int main(){
	string s1;
	string s2;
	int p1;
	int p2;
	string x1;
	string x2;
	cin >> s1;
	cin >> p1;
	cin >> x1;
	cin >> s2;
	cin >> p2;
	cin >> x2;
	if (p1 > p2){
		cout << s1 << endl;
	}
	else if (p1 < p2){
		cout << s2 << endl;
	}
	else{
		cout << "-1" << endl;
	}
	return 0;
}