#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < n; ++i)
using ll = long long;
using namespace std;
const int INF = 1e9;

int main() {
    int n, cnt = 0;
    int flag[10] = {0};

    cin >> n;

    rep(_, n) {
        int a[4];
        string S;
        rep(i, 4) cin >> a[i];
        cin >> S;

        if (S == "NO")
            rep(i, 4) flag[a[i]] = -1;

        else {
            ++cnt;
            rep(i, 4) {
                if (flag[a[i]] != -1)
                    ++flag[a[i]];
            }
        }
    }

    rep(i, 10) {
        if (flag[i] == cnt)
            cout << i << endl;
    }

    return 0;
}