import java.math.BigInteger;
import java.util.Scanner;
public class No201 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 一人目を入力
		String name1 = sc.next();
		BigInteger p1 = new BigInteger(sc.next());
		String x1 = sc.next();
		// 二人目を入力
		String name2 = sc.next();
		BigInteger p2 = new BigInteger(sc.next());
		String x2 = sc.next();
		// 判定
		if(p1.compareTo(p2) == 1){
			System.out.println(name1);
		}else if(p1.compareTo(p2) == -1){
			System.out.println(name2);
		}else{
			System.out.println("-1");
		}
	}
}