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#include <iostream>
#include <vector>

using namespace std;

int main()
{
    int n;
    cin>>n;
    int ile = 0;
    vector<int> wyn;
    for(int i=1;i<=n;i++){
        string s;
        int x;
        cin>>s>>x;
        if(s=="NIE") continue;
        if(ile<10){
            wyn.push_back(i);
            ile++;
        }else{
            if(x<2){
                wyn.push_back(i);
                ile++;
            }
        }
        if(ile==20) break;
    }
    for(int k : wyn){
        cout<<k<<" ";
    }
    cout<<endl;
    return 0;
}