using System;
using System.Linq;

namespace No024_数当てゲーム
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] yes = Enumerable.Repeat(1, 10).ToArray();
            int[] no = Enumerable.Repeat(0, 10).ToArray();
            int max = 0, pos = 0;

            int n = int.Parse(Console.ReadLine());

            for (int i = 0; i < n; i++)
            {
                string[] input = Console.ReadLine().Split(' ');

                if (input[4] == "YES")
                    for (int j = 0; j < 4; j++)
                        yes[int.Parse(input[j])]++;
                else
                    for (int j = 0; j < 4; j++)
                        no[int.Parse(input[j])]++;
            }

            for (int i = 0; i < 10; i++)
            {
                if (no[i] > 0)
                    yes[i] = 0;
                if (max < yes[i])
                {
                    max = yes[i];
                    pos = i;
                }
            }

            Console.WriteLine(pos.ToString());
        }
    }
}