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// clang-format off
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define ssize(x) int(x.size())
template<class A,class B>auto&operator<<(ostream&o,pair<A,B>p){return o<<'('<<p.first<<", "<<p.second<<')';}
template<typename T,typename = typename enable_if<!is_same<T,string>::value>::type>
auto operator<<(ostream&o,T x)->decltype(x.end(),o){o<<'{';int i=0;for(auto e:x)o<<(", ")+2*!i++<<e;return o<<'}';}
#ifdef DEBUG
#define debug(x...) cerr<<"["#x"]: ",[](auto...$){((cerr<<$<<"; "),...);}(x),cerr<<'\n'
#else
#define debug(...) {}
#endif
// clang-format on

vector<int> ans;

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int n, a;
    cin >> n;
    string s;
    for (int i = 1; i <= n; i++)
    {
        cin >> s >> a;
        if (s == "NIE")
            continue;
        if (ssize(ans) >= 10 && a >= 2)
            continue;
        ans.push_back(i);
        if (ssize(ans) == 20)
            break;
    }

    for (int i : ans)
        cout << i << ' ';

    return 0;
}