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

int main(){
    cin.tie(NULL) -> sync_with_stdio(NULL);
    int n;
    cin >> n;
    int cnt = 0;
    for(int i = 1; i <= n; i++){
        string s; int x;
        cin >> s >> x;
        if(s == "NIE") continue;
        if(cnt < 10){
            cout << i << " ";
            cnt++;
            continue;
        }
        if(cnt >= 10 && x < 2){
            cout << i << " ";
            cnt++;
        }
        if(cnt == 20) return 0;
    }
    return 0;
}