#include <iostream>
#include <string>
#include <vector>
#include <functional>
#include <algorithm>

#define REP(i,n) for(int i;i<(n);i++)

using namespace std;

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);

    string a, b, g;
    long ap, bp;
    cin >> a >> ap >> g;
    cin >> b >> bp >> g;
    if (ap > bp)
        cout << a << endl;
    else if (ap < bp)
        cout << b << endl;
    else cout << -1 << endl;

    return 0;
}