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// clang-format off
#include <bits/stdc++.h>

using namespace std;

#define ALL(x) (x).begin(), (x).end()

template<class C> void mini(C &a5, C b5) { a5 = min(a5, b5); }
template<class C> void maxi(C &a5, C b5) { a5 = max(a5, b5); }

#ifdef LOCAL
const bool debug = true;
#else
const bool debug = false;
#define cerr if (true) {} else cout
#endif
// clang-format on

#define int long long
#define double long double

const int INF = 1e18;
const int mod = 1e9 + 7;

int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n, finalists=0;
    cin >> n;
    for (int i = 1; i <= n; i++) {
        string s;
        int x;
        cin >> s >> x;

        if (s == "NIE") continue;
        if (finalists >= 20) continue;
        if (finalists >= 10 && x >= 2) continue;

        finalists++;
        cout << i << " ";
    }
    
    return 0;
}/*

*/