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#include <bits/stdc++.h>
using namespace std;
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int n; cin>>n;
	vector<int>ans;
	for (int i=1; i<=n; i++)
	{
		string s;
		int o;
		cin>>s>>o;
		if (s == "NIE" || (ans.size() >= 10 && o >= 2)) continue;
		else if (ans.size() < 20) ans.push_back(i);
	}
	for (auto i : ans) cout<<i<<" ";
	cout<<"\n";
}