using System;
using System.Linq;
using System.Collections.Generic;

public class yukicoder
{

	public static int convert(string s)
	{
		if(s == "r") return 0;
		else if(s == "s") return 1;
		else return 2;
	}

    public static void Main()
    {
        string[] a = Console.ReadLine().Split(' ');
        string[] b = Console.ReadLine().Split(' ');
        
        decimal aa = decimal.Parse(a[1]);
        decimal bb = decimal.Parse(b[1]);
        
        int aaa = convert(a[2]);
        int bbb = convert(b[2]);
        
        
        if(aa != bb)
        {
        	if(aa > bb)
        	{
		        Console.WriteLine(a[0]);
        	}
        	else
        	{
        		Console.WriteLine(b[0]);
        	}
        }
        else
        {
        	if(aaa == bbb)
        	{
        		Console.WriteLine("-1");
        	}
        	else if(aaa - bbb == -1 || aaa - bbb == 2)
        	{
        		Console.WriteLine(a[0]);
        	}
        	else
        	{
        		Console.WriteLine(b[0]);
        	}
        }
        
    }
}