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#include <bits/stdc++.h>
using namespace std;
typedef vector<int> VI;
typedef pair <int,int> ii;
typedef long long LL;
#define pb push_back
const int INF = 2147483647;
const int N = 500005;

string s;
int n, i, u, a;

int main() {
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
cin >> n;
for (i=1;i<=n;i++) {
	cin >> s >> a;
	if (s[0] == 'N' || u == 20) continue;
	if (a >= 2 && u >= 10) continue;
	cout << i << " ";
	u++;
}
cout << endl;
return 0;
}