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#include <bits/stdc++.h>

using namespace std;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int n;
    cin >> n;
    
    int counter = 0, i;
    for (i = 1; i <= n; ++i)
    {        
        string allowed;
        int participations;
        
        cin >> allowed >> participations;
        
        if (allowed == "NIE")
        {
            continue;
        }
        
        if (counter < 10)
        {
            cout << i << " ";
            ++counter;
            continue;
        }
        
        if (participations < 2)
        {
            cout << i << " ";
            ++counter;
            
            if (counter == 20)
            {
                break;
            }
        }
    }

    return 0;
}