#include <bits/stdc++.h>

using namespace std;

#define REP(i, n) for(int i = 0; i < n; i++)

int main() {
    int num[10] = {0};
    int N;
    cin >> N;
    int a, b, c, d;
    string s;
    REP(i, N) {
        cin >> a >> b >> c >> d >> s;
        if (s == "YES") {
            num[a]++;
            num[b]++;
            num[c]++;
            num[d]++;
        } else {
            num[a] = num[b] = num[c] = num[d] = -100;
        }
    }

    int tmp = -1, ans;
    REP(i, 10) {
        if (num[i] > tmp) {
            tmp = num[i];
            ans = i;
        }
    }
    cout << ans << endl;
    return 0;
}