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#include <bits/stdc++.h>

#define FASTIO ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

using namespace std;

int main() {

    vector<int> res(20);
    int n; cin >> n;
    int idx = 0;
    for (int i = 0; i < n; i++) {
        string s; cin >> s;
        int x; cin >> x;
        if (s == "NIE") {
            continue;
        }
        if (idx < 10) {
            res[idx] = i + 1;
            idx++;
        } else if (x < 2) {
            res[idx] = i + 1;
            idx++;
        }
        if (idx == 20) {
            break;
        }
    }
    for (auto i : res) {
        cout << i << " ";
    }
    cout << endl;
}