#include<bits/stdc++.h>
using namespace std;
#define boost ios_base::sync_with_stdio(false); cin.tie(0);
#define int long long
#define vi vector<int>
#define pb push_back

void solve() {
    int n;
    cin >> n;

    vi Ans;

    for(int i=1; i <= n; i++) {
        string s;
        int x;
        cin >> s >> x;
        if(s == "NIE" || Ans.size() == 20) continue;
        if(Ans.size() < 10) {Ans.pb(i); continue;}
        if(x < 2) Ans.pb(i);
    }

    for(auto &ans : Ans) cout << ans << " ";
    cout << "\n";
}

signed main() {
    boost
    solve();
}