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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;

const int mod = 998244353;

int add(int a, int b)
{
	return a + b < mod ? a + b : a + b - mod;
}

int sub(int a, int b)
{
	return a - b >= 0 ? a - b : a - b + mod;
}

int mult(int a, int b)
{
	return (LL)a * b % mod;
}

int binpow(int a, LL n)
{
	int res = 1;
	while (n)
	{
		if (n & 1)
			res = mult(res, a);
		a = mult(a, a);
		n /= 2;
	}
	return res;
}

template<typename T>
void updMin(T& a, T b)
{
	a = min(a, b);
}

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);
		if (SZ(ans) == 20)
			break;
	}
	assert(SZ(ans) == 20);
	FOR(i, 0, SZ(ans))
	{
		if (i > 0)
			cout << " ";
		cout << ans[i] + 1;
	}
	cout << "\n";
	return 0;
}