using System.Numerics;

public class Program
{
    public static void Main()
    {
        //Biginteger num =BigInteger.Parse(Console.ReadLine() ?? string.Empty);
        string[] str = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        string[] str2 = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        //string str = Console.ReadLine() ?? string.Empty;

        string name1 = str[0];
        string name2 = str2[0];

        BigInteger point1 = BigInteger.Parse(str[1]);
        BigInteger point2 = BigInteger.Parse(str2[1]);

        if(point1 >  point2)
        {
            Console.WriteLine(name1);
        }
        else if(point1 < point2)
        {
            Console.WriteLine(name2);
        }
        else
        {
            Console.WriteLine(-1);
        }


    }
}