#include <iostream>
#include <string>
using namespace std;
int main()
{
	string name[2];
	string yp[2];
	string h[2];
	for (int i = 0; i < 2; i++)
	{
		cin >> name[i] >> yp[i] >> h[i];
	}

	if (yp[0].size() > yp[1].size()) cout << name[0] << endl;
	else if (yp[0].size() < yp[1].size()) cout << name[1] << endl;
	else
	{
		if (yp[0] > yp[1])
		{
			cout << name[0] << endl;
		}

		else if (yp[0] < yp[1])
		{
			cout << name[1] << endl;
		}

		else cout << "-1" << endl;

	}
	return 0;
}