#include <bits/stdc++.h>
#define MOD 1000000007

using namespace std;

typedef pair<int,int> P;
typedef pair<int,pair<int,int>> PP;
typedef long long LL;

const double EPS = 1e-8;
const int INF = 1e9;

int dy[] = {0,1,0,-1};
int dx[] = {1,0,-1,0};

int main(void) {
	int N;
	cin >> N;

	vector<int> v(10);
	for(int i=0;i<N;i++){
		int a[4];
		string s;
		for(int i=0;i<4;i++)cin >> a[i];
		cin >> s;

		if(s == "YES"){
			for(int i=0;i<4;i++)v[a[i]]++;
		}else
			for(int i=0;i<4;i++)v[a[i]] = -INF;
	}
	
	int a,b=-INF;
	for(int i=0;i<10;i++){
		if(v[i] < 0)continue;
		if(b < v[i]){
			a = i;
			b = v[i];
		}
	}
	cout << a << endl;
	return 0;
}