#include <iostream>
#include <string>

using namespace std;

int main() {
  int n, a, b, c, d;
  char s[3];
  int x[10] = {};

  cin >> n;
  for (int i = 0; i < n; i++) {
    cin >> a >> b >> c >> d >> s;
    if (s == "YES") {
      x[a]++;
      x[b]++;
      x[c]++;
      x[d]++;
    } else {
      x[a]--;
      x[b]--;
      x[c]--;
      x[d]--;
    }
  }

  int r = 0;
  for (int i = 1; i < 10; i++) {
    if (x[r] < x[i]) {
      r = i;
    }
  }
  cout << r << endl;
  return 0;
}