using System;
using System.Linq;

class Program
{
    public void Solve()
    {
        int N = int.Parse(Console.ReadLine());
        string[] ABCDR;

        int[] chk = new int[10];

        for (int i = 0; i < N; i++)
        {
            ABCDR = Console.ReadLine().Split(' ').ToArray();

            for (int j = 0; j < ABCDR.Length - 1; j++)
            {
                if ("YES".Equals(ABCDR[ABCDR.Length - 1])) chk[int.Parse(ABCDR[j])]++;
                else chk[int.Parse(ABCDR[j])] = -1;
            }
        }

        Console.WriteLine(Array.IndexOf(chk, chk.Max()));
    }

    static void Main()
    {
        var solver = new Program();
        solver.Solve();
    }
}