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

namespace _4_3_14_BoatSimulator
{
    class Program
    {
        static void Main(string[] args)
        {
            char boat1 = char.Parse(Console.ReadLine());
            char boat2 = char.Parse(Console.ReadLine());

            byte strNum = byte.Parse(Console.ReadLine());

            int score1 = 0;
            int score2 = 0;
            char winner = ' ';

            for (int i = 1; i <= strNum; i++)
            {
                string speed = Console.ReadLine();

                if (speed == "UPGRADE")
                {
                    boat1 += (char)3;
                    boat2 += (char)3;
                }
                else
                {
                    if (i % 2 == 0)
                    {
                        if (i == strNum && score2 > score1)
                        {
                            winner = boat2;
                            break;
                        }
                        else if (score2 >= 50)
                        {
                            winner = boat2;
                            break;
                        }
                        else
                        {
                            score2 = score2 + speed.Length;
                        }
                    }
                    else
                    {
                        if ((i == strNum) && (score1 > score2))
                        {
                            winner = boat1;
                            break;
                        }
                        else if (score1 >= 50)
                        {
                            winner = boat1;
                            break;
                        }
                        else
                        {
                            score1 = score1 + speed.Length;
                        }
                    }
                }
            }
            Console.WriteLine(winner);
        }
    }
}