#include <iostream>
#include <vector>
#include <string>
using namespace std;
using ll = long long;

int main() {
    int N;
    cin >> N;
    vector<bool> v(10, true);
    for(int i=0; i<N; ++i) {
        int a, b, c, d;
        string r;
        cin >> a >> b >> c >> d >> r;
        if(r == "NO") {
            v[a] = v[b] = v[c] = v[d] = false;
        } else {
            for(int j=0; j<10; ++j) {
                if(j != a && j != b & j != c && j != d) {
                    v[j] = false;
                }
            }
        }
    }
    for(int i=0; i<10; ++i) {
        if(v[i]) {
            cout << i << endl;
        }
    }
}