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


class Program
{
    static void Main()
    {
        int N = int.Parse(Console.ReadLine());
        var ans = new List<int>()
        {
            0,1,2,3,4,5,6,7,8,9
        };
        var New = new List<int>();
        var x = new List<int>();
        var y = new List<int>();

        for(int i=0;i<N;i++){
            string[] Pre = Console.ReadLine().Split(' ');
            for(int s = 0;s < 4;s++){
                if(Pre[4] == "YES"){
                    x.Add(int.Parse(Pre[s]));
                }else if(Pre[4] == "NO"){
                    y.Add(int.Parse(Pre[s]));
                }
            }
                if(x.Count == 4){
                    foreach(int a in ans)
                    {
                        if (0 <= x.IndexOf(a) && !New.Contains(a))
                        {
                            New.Add(a);
                        }
                    }
                    ans = New;
                    x = new List<int>();
                    New = new List<int>();
                }else if(y.Count == 4){
                    foreach(int b in ans)
                    {
                        if(y.IndexOf(b)<0)
                        {
                            New.Add(b);
                        }
                    }
                    ans = New;
                    y = new List<int>();
                    New = new List<int>();
                }
        }
        foreach(int c in ans){
            Console.Write(c);
        }
    }
}