#include <bits/stdc++.h>

using namespace std;

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

  int ok[10] = {};
  for (int i = 0; i < n; i++) {
    int x[4];
    string s;
    for (int j = 0; j < 4; j++) {
      cin >> x[j];
    }
    cin >> s;

    for (int j = 0; j < 4; j++) {
      if (s == "YES") ok[x[j]]++;
      else ok[x[j]]--;
    }
  }

  int cnt = 0, ans;
  for (int i = 0; i < 10; i++) {
    if (ok[i] < cnt) continue;
    cnt = ok[i];
    ans = i;
  }

  cout << ans << endl;

  return 0;
}