using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _08.PrimeNumberCheck
{
    class PrimeNumberCheck
    {
        static void Main(string[] args)
        {
            char a = char.Parse(Console.ReadLine());
            char b = char.Parse(Console.ReadLine());
            int n = int.Parse(Console.ReadLine());
            int aM = 0;
            int bM = 0;
            for (int i = 1; i <= n; i++)
            {
                string steps = Console.ReadLine();

                if (steps == "UPGRADE")
                {
                    a += (char)3;
                    b += (char)3;
                }
                else if (i % 2 == 0)
                {
                    bM += steps.Length;
                }
                else
                {
                    aM += steps.Length;
                }
                if (aM >= 50 || bM >= 50)
                    break;
            }
            if (aM > bM)
            {
                Console.WriteLine(a);
            }
            else
            {
                Console.WriteLine(b);
            }
        }
    }
}