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#include <iostream>

using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int n;
    cin >> n;

    string can;
    int finals;
    int finalists = 0;
    for (int i = 0; i < n; i++) {
        cin >> can >> finals;
        if (can == "NIE") {
            continue;
        }
        if (finalists < 10 || (finalists < 20 && finals < 2)) {
            cout << i + 1 << " ";
            finalists++;
        }
        if (finalists == 20) {
            break;
        }
    }
}