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#include <bits/stdc++.h>

using namespace std;

#define st first
#define nd second
#define pb push_back
#define rep(i,a,b) for(int i = a; i <= b; i++)
#define irep(i,a,b) for(int i = a; i >= b; i--)
typedef long long ll;
typedef long double ld;
//typedef __int128 int128;
typedef vector<int> vi;
typedef pair<int,int> pi; 
typedef pair<double,double> pd;
typedef pair<ll,ll> pl;

int main(){

    ios::sync_with_stdio(0);
    cin.tie(0);

    int n; cin >> n;
    int ile = 0;
    rep(i,1,n){
        string s; int x; cin >> s >> x;
        if(s == "NIE") continue;
        if(ile == 20) continue;
        if(ile >= 10 && x >= 2) continue;
        ile++; cout << i << ' ';
    }

    return 0;
}

//g++ -O3 -static -Wall .cpp -std=c++17