#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <ctime>
#include <cctype>
#include <climits>
#include <iostream>
#include <string>
#include <vector>
#include <map>
#include <list>
#include <queue>
#include <deque>
#include <algorithm>
#include <numeric>
#include <utility>
#include <complex>
#include <memory>
#include <functional>
 
using namespace std;

int main(int argc, char const *argv[]) {
    string name1, name2, temp;
    int score1, score2;
    cin >> name1;
    cin >> score1;
    cin >> temp;
    cin >> name2;
    cin >> score2;
    if (score1 > score2) {
        cout << name1 << endl;
    } else if (score1 == score2) {
        cout << "-1" << endl;
    } else {
        cout << name2 << endl;
    }
    return 0;
}