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#include <bits/stdc++.h>
using namespace std;

#define FOR(i, a, b) for(int i = (a); i < (b); i++)
#define RFOR(i, a, b) for(int i = (a) - 1; i >= (b); i--)
#define SZ(a) int(a.size())
#define ALL(a) a.begin(), a.end()
#define PB push_back
#define MP make_pair
#define F first
#define S second

typedef long long LL;
typedef vector<int> VI;
typedef vector<LL> VL;
typedef pair<int, int> PII;
typedef pair<LL, LL> PLL;
typedef double db;

int main()
{
	ios::sync_with_stdio(0); 
	cin.tie(0);
	
	int n;
	cin >> n;
	
	VI ans;
	FOR(i, 0, n)
	{
		string s;
		int x;
		cin >> s >> x;
		
		if(s == "NIE")
			continue;
		
		if(SZ(ans) < 10 || x < 2)
			ans.PB(i + 1);
	}
	FOR(i, 0, 20)
	{
		if(i)
			cout << " ";
		cout << ans[i];
	}
	cout << "\n";
	
	
	
	
	return 0;
}