// Witold Milewski
// PA 2025
#include <bits/stdc++.h>
using namespace std;
#define FOR(i, a, b) for(int i=a; i<=b; ++i)
#define sz(A) (int)(A.size())
#define eb emplace_back
#define pb push_back
#define pi pair<int, int>
#define f first
#define s second
#define rs resize
#define V vector

int n;

signed main() {
  cin.tie(0) -> ios_base::sync_with_stdio(0);
  cin >> n;
  string a;
  int b;
  int cnt=0;
  FOR(i, 1, n) {
    cin >> a >> b;
    if(a=="NIE") continue;
    if(cnt<10 || (cnt<20 && b<=1)) {
      ++cnt;
      cout << i << ' ';
    }
  }
  cout << '\n';
}