#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <time.h>
#include <cstdlib>
#include <cmath>
#include <fstream>

int main(void) {

	//test用
	//std::ifstream in("test.txt");
	//std::cin.rdbuf(in.rdbuf());

	int N;
	std::cin >> N;

	std::vector<int> num(10);
	for (int i = 0; i < N; i++) {
		
		std::vector<int> temp(4);
		for (int j = 0; j < 4; j++) {
			std::cin >> temp[j];
		}

		std::string R;
		std::cin >> R;

		if (R == "YES") {
			for (int j = 0; j < 4; j++) {
				num[temp[j]]++;
			}
		}
		else {
			for (int j = 0; j < 4; j++) {
				num[temp[j]]--;
			}
		}
	}

	size_t index = std::distance(num.begin(),std::max_element(num.begin(), num.end()));
	std::cout << index << std::endl;

}