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#include <bits/stdc++.h>
using namespace std;
#ifdef DEBUG
auto operator<<(auto&o, auto p)->decltype(p.first, o){return o<<'('<<p.first<<", "<<p.second<<')';}
auto operator<<(auto&o, auto x)->decltype(x.end(), o){o<<'{';int i=2;for (auto e:x)o<<(", ")+i<<e,i=0;return o<<'}';}
#define LOG(X...)cerr<<"["#X"]: ",[](auto...$){((cerr<<$<<"; "),...)<<endl;}(X);
#else
#define LOG(X...)(void)0
#endif

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n;
    cin >> n;
    int count = 0;
    for (int i = 0; i < n; i++) {
        string s;
        int number;
        cin >> s >> number;
        if (count == 20)
            continue;
        if (s == "NIE")
            continue;
        if (number > 1 && count >= 10)
            continue;
        cout << i + 1 << " ";
        ++count;
    }
    cout << "\n";
}