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

constexpr int maxn = 1e6 + 7;
int n, licz;
pair<int, int> p[maxn];
vector<int>ans;
string s;
int x;

int32_t main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n;
    for(int i = 1; i <= n; i++){
        cin >> s >> x;
        if(licz >= 20) continue;
        if(s == "NIE") continue;
        if(licz < 10){
            ans.push_back(i);
            licz++;
            continue;
        }
        if(x < 2){
            ans.push_back(i);
            licz++;
            continue;
        }
    }
    for(auto el : ans) cout << el << " ";
    cout << '\n';
}