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#include<iostream>
#include<vector>

using namespace std;

int main() {
    vector<int> fin;

    int n;
    cin >> n;

    string s;
    int num;
    for (int i = 0; i < n; ++i) {
        cin >> s >> num;

        // cout << i + 1 << ": " << s << " " << num << "\n";

        if (s == "NIE") continue;
        if (fin.size() == 20) break;
        if (fin.size() < 10) {
            fin.push_back(i + 1);
        } else if (num < 2) {
            fin.push_back(i + 1);
        }
    }

    // cout << fin.size() << "\n";

    for (int x : fin) cout << x << " ";

}