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

int N;

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    int N;
    int Cnt = 0;
    cin >> N;
    for (int i = 1; i <= N; i++) {
        string s; cin >> s;
        int x; cin >> x;
        if ((s == "NIE") || (Cnt >= 20)) continue;

        if ((Cnt <= 10) || (x <= 1)) {
            cout << i << " ";
            Cnt++;
        }
    }    
    cout << "\n";
}