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#include <iostream>

using namespace std;

int main(){
    ios_base::sync_with_stdio(0); 
    cin.tie(0);
    cout.tie(0);

    int n,c=0,h, i=1;
    string H;
    cin>>n;
    for(i; i<=n&&c<10; i++){
        cin>>H>>h;
        if(H=="NIE"){
            continue;
        }
        cout<<i<<" ";
        c++;
    }
    for(i; i<=n&&c<20; i++){
        cin>>H>>h;
        if(H=="NIE"||h>1){
            continue;
        }
        cout<<i<<" ";
        c++;
    }
    return 0;
}