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#include <bits/stdc++.h>
using namespace std;
int n, k;
vector < int > v;
int main() {
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(NULL);
    cin >> n;
    for (int i = 0; i < n; ++i) {
        string c;
        cin >> c >> k;
        if (v.size() == 20) continue;
        if ((v.size() < 10 && c[2] == 'K') || (c[2] == 'K' && k < 2))
            v.push_back(i + 1);
    }
    for (auto & i : v) {
        cout << i << ' ';
    }
}