#if defined(__GNUG__) && !defined(__clang__)
#include <bits/stdc++.h>
#endif

#define inf(T) (numeric_limits<T>::min())
#define sup(T) (numeric_limits<T>::max())
#define rep(i,n) for (int i = 0; i < (n); i++)
#define asc(c) (c).begin(), (c).end()
#define desc(c) (c).rbegin(), (c).rend()
#define mp(...) make_pair(__VA_ARGS__)
#define mt(...) make_tuple(__VA_ARGS__)

using namespace std;

using ll = long long;
using ld = long double;

template <class Key>          using uset = unordered_set<Key>;
template <class Key, class T> using umap = unordered_map<Key, T>;

int main()
{
  cin.tie(0);
  ios::sync_with_stdio(false);

  int n;
  cin >> n;
  vector<int> rs(10);
  rep(i,n) {
    int a, b, c, d;
    string r;
    cin >> a >> b >> c >> d >> r;
    if (r == "YES") {
      if (rs[a] >= 0) rs[a] += 1;
      if (rs[b] >= 0) rs[b] += 1;
      if (rs[c] >= 0) rs[c] += 1;
      if (rs[d] >= 0) rs[d] += 1;
    } else {
      rs[a] = -1;
      rs[b] = -1;
      rs[c] = -1;
      rs[d] = -1;
    }
  }

  map<int, int> m;
  rep(i,10) m[rs[i]] = i;
  cout << m.rbegin()->second << endl;

  return 0;
}