import java.util.*;
import java.math.*;

class Human{
	String name;
	BigInteger point;
	String hands;
}

public class pre {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
		Human a = new Human();
		a.name = s.next();
		a.point = s.nextBigInteger();
		a.hands = s.next();
		Human b = new Human();
		b.name = s.next();
		b.point = s.nextBigInteger();
		b.hands = s.next();
		
		switch(a.point.compareTo(b.point)){
			case -1:
				System.out.println(b.name);
				break;
				
			case 0:
				System.out.println("-1");
				break;
				
			case 1:
				System.out.println(a.name);
				break;
				
			default:
				break;
		}
    }
}