#include <bits/stdc++.h>
using namespace std;

#define dump(x) cout << (x) << '\n'
#define Int int64_t
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()

Int INF = 1e18;
int inf = 1e9;
Int mod = 1e9+7;

int main() {
    Int n;
    cin >> n;
    vector<bool> no(10, false);
    for (Int i = 0; i < n; i++) {
        Int a, b, c, d;
        string s;
        cin >> a >> b >> c >> d >> s;
        if (s == "YES") {
            for (Int j = 0; j <= 9; j++) {
                if (j != a and j != b and j != c and j != d) {
                    no[j] = true;
                }
            }
        } else {
            no[a] = no[b] = no[c] = no[d] = true;
        }
    }
    for (Int i = 0; i <= 9; i++) {
        if (not no[i]) {
            dump(i);
        }
    }
    return 0;
}