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

int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    int n, ile = 0, sta;
    vector <int> wyn = {};
    cin>>n;
    string s;
    for (int i = 1; i<=n; i++){
        cin>>s>>sta;
        if(s == "NIE"){
            continue;
        }
        else if(ile < 10 || (ile < 20 && sta < 2)){
            wyn.push_back(i);
            ile++;
        }
    }
    for (auto a : wyn){
        cout<<a<<" ";
    }
}