#include <iostream>
#include <string>
#include <algorithm>

#define FOR(i, a, b) for(int (i) = (a); (i) < (b); ++(i))
#define rep(i, a) FOR((i), (0), (a))

int num[10];

int main(){
	int n;
	std::cin >> n;
	rep(i, n){
		int a[4];
		std::string s;
		rep(j, 4)std::cin >> a[j];
		std::cin >> s;
		if (s == "YES")rep(j, 4)++num[a[j]];
		else if (s == "NO")rep(j, 4)num[a[j]] = -100;
	}
	std::cout << std::max_element(num, num + 10) - num << std::endl;
	return 0;
}