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#include <iostream>

using namespace std;

int main() {

    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n; cin >> n;
    int m = 10;
    bool b = false;
    for(int i = 1; i <= n; i++) {
        string s; int x; cin >> s >> x;
        if(s == "NIE") continue;

        if(m) {
            if(b) {
                if(x < 2) {
                    cout << i << " ";
                    m--;
                }
            }
            else {
                cout << i << " ";
                m--;
                if(m == 0) {
                    m = 10;
                    b = true;
                }
            }
        }
    }
    cout << "\n";

    return 0;
}