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#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;
int main() {
  string dec;
  int n;
  int p;
  vector<int> tab;
  cin >> n;
  for (int i = 1; i <= n; ++i) {
    cin >> dec >> p;
    if (dec[0] == 'T') {
      if (tab.size() < 10) {
        tab.push_back(i);
      } else if (tab.size() < 20 && p < 2) {
        tab.push_back(i);
      }
    }
  }
  for (int i = 0; i < tab.size(); ++i) {
    cout << tab[i] << " ";
  }
}