#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int n;
  cin >> n;
  vector<bool> cand(10, true);
  rep(i, n) {
    int a, b, c, d;
    string s;
    cin >> a >> b >> c >> d >> s;
    if (s == "NO") {
      cand[a] = cand[b] = cand[c] = cand[d] = false;
    }
    else {
      rep(i, 10) {
        if (i != a && i != b && i != c && i != d) {
          cand[i] = false;
        }
      }
    }
  }
  rep(i, 10) {
    if (cand[i]) cout << i << endl;
  }
  return 0;
}