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


int main() {
    int n, counter = 0;
    cin >> n;
    for (int i = 1; i <= n; i++) {
        if (counter == 20)
            break;
        string s;
        cin >> s;
        int x;
        cin >> x;
        if (s == "NIE")
            continue;
        if (counter < 10) {
            counter++;
            cout << i << " ";
            continue;
        }
        if (x < 2) {
            counter++;
            cout << i << " ";
        }
    }
}