import java.io.File;
import java.util.*;

public class Main {
	public static void main(String[] args){
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		String aname = sc.next();
		String ate  = sc.next();
		String atee = sc.next();

		String bname = sc.next();
		String bte  = sc.next();
		String btee = sc.next();
		if(ate.length()>bte.length()){
			System.out.println(aname);
		}else if(ate.length()<bte.length()){
			System.out.println(bname);
		}else{
			for(int i=0;i<ate.length();i++){
				if(ate.charAt(i)>bte.charAt(i)){
					System.out.println(aname);
					return;
				}else if(ate.charAt(i)<bte.charAt(i)){
					System.out.println(bname);
					return;
				}
			}
			System.out.println(-1);
		}
	}
}