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#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

#pragma GCC optimize("O0")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,tune=native")
#pragma GCC optimize("unroll-loops")

using namespace std;
//using namespace __gnu_pbds;

#define pb push_back
#define F first
#define S second
#define ll long long
#define ld double long
#define ull unsigned long long
#define endl '\n'


const ll N = 3e5 + 36;
const ll M = 2e3 + 36;
const ll INF = 1e9 + 7;
const ll MOD = 1e9 + 7;
const ll MOD1 = 888888901;
const ll MOD2 = 999988901;
const ll X[8] = {1, -1, 2, 2, -2, -2, 1, -1};
const ll Y[8] = {2, 2, 1, -1, 1, -1, -2, -2};
const ld PI = 3.14159265358979323846;
const ld EPS = 1e-10;

//tree < pair < string, int >, null_type, less < pair < string, int > >, rb_tree_tag, tree_order_statistics_node_update > a;

//mt19937 gen(chrono::system_clock::now().time_since_epoch().count());
mt19937 gen(19937);


signed main() {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#else
//    freopen("input.txt", "r", stdin);
//    freopen("output.txt", "w", stdout);
#endif // LOCAL
    int n;
    cin >> n;
    vector<pair<bool, int>> a(n);
    int now = 0;
    for (int i(0); i < n && now < 20; ++i){
      string s;
      int k;
      cin >> s >> k;
      if (s == "NIE") {
         continue;
      }
      if (now < 10) {
         cout << i + 1 << ' ';
         ++now;
      } else {
         if (k < 2) {
            cout << i + 1 << ' ';
            ++now;
         }
      }
    }

    return 0;
}