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#include <bits/stdc++.h>

using namespace std;

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


    int n;
    cin >> n;

    int counter = 0;
    for (int i = 1; i <= n; i++) {
        string wantFinal;
        int pastFinals;

        cin >> wantFinal >> pastFinals;

        if (wantFinal == "NIE")
            continue;
        if (counter < 10 || pastFinals < 2) {
            counter++;
            cout << i << ' ';
        }
        if (counter == 20) {
            cout << "\n";
            return 0;
        }
    }

    return 0;
}