import java.math.BigInteger;
import java.util.Scanner;

public class Main {
    public static void main(String[] argv) {
        Scanner scanner = new Scanner(System.in);
        String name1, name2;
        BigInteger p1, p2;
        name1 = scanner.next();
        p1 = new BigInteger(scanner.next());
        scanner.next();
        name2 = scanner.next();
        p2 = new BigInteger(scanner.next());
        scanner.next();
        int res = p1.compareTo(p2);
        if (res > 0) {
            System.out.println(name1);
        } else if (res < 0) {
            System.out.println(name2);
        } else {
            System.out.println(-1);
        }
    }
}