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#include <iostream>

using namespace std;

int main() {
    int n;
    cin >> n;
    int c = 0, i = 0;
    while (c < 20) {
        i++;
        string s;
        cin >> s;
        int k;
        cin >> k;
        if (s == "NIE") continue;
        if (c >= 10 && k >= 2) continue;
        cout << i << ' ';
        ++c;
    }
}