#include <iostream>
#include <string>
#include <vector>
#include <array>

int main()
{
	int n;
	std::cin >> n;
	std::vector<std::array<int, 4>> num;
	std::vector<std::string> S;
	num.resize(n);
	S.resize(n);

	for (int i = 0; i < n; i++)
	{
		for (int j = 0; j < 4; j++)
		{
			std::cin >> num[i][j];
		}
		std::cin >> S[i];
	}
	std::array<int, 10> Result = { 0 };
	for (int i = 0; i < n; i++)
	{
		for (int j = 0; j < 4; j++)
		{
			if (S[i] == "YES")
			{
				if (Result[num[i][j]] != -1)
				{
					Result[num[i][j]]++;
				}
			}
			else
			{
				Result[num[i][j]] = -1;
			}
		}
	}
	int answer = 0;
	for (int i = 0; i < 10; i++)
	{
		if (Result[answer] < Result[i])
		{
			answer = i;
		}
	}

	std::cout << answer << std::endl;



	return 0;
}