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

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

    int n;
    cin >> n;
    int indexes[20];
    for(int i=0, index = 0; i<n; i++) {
        string response;
        int times;
        cin >> response >> times;
        if(response == "NIE") {
            continue;
        }
        //else -> handle
        if(index < 10 || times < 2) {
            indexes[index++] = i+1;
            if(index == 20) {
                break;
            }
        }
    }
    for(int i=0; i<20; i++) {
        cout << indexes[i] << " ";
    }

    return 0;
}