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

const int N = 1e6 + 5;

#define st first
#define nd second

typedef pair<int,int> pun;
typedef long long ll;

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int n;
	cin >> n;
	vector<int> v;
	vector<bool> ans;
	for (int i = 0; i < n; i ++) {
		string s;
		cin >> s;
		if (s[0] == 'T') {
			ans.push_back(true);
		} else {
			ans.push_back(false);
		}
		int x;
		cin >> x;
		v.push_back(x);
	}
	vector<int> res;
	for (int i = 0; i < n; i ++) {
		if (ans[i]) {
			if (res.size() < 10) res.push_back(i+1);
			else if (res.size() < 20 && v[i] < 2) res.push_back(i+1);
		}
	}
	for (int x : res) cout << x << " ";

}