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#include <cstdlib>
#include <bitset>
#include <functional>
#include <utility>
#include <chrono>
#include <tuple>
#include <new>
#include <memory>
#include <climits>
#include <cfloat>
#include <cinttypes>
#include <exception>
#include <string>
#include <array>
#include <vector>
#include <deque>
#include <list>
#include <forward_list>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <stack>
#include <queue>
#include <algorithm>
#include <iterator>
#include <cmath>
#include <complex>
#include <valarray>
#include <ios>
#include <istream>
#include <ostream>
#include <iostream>
#include <fstream>
#include <streambuf>
#include <cstdio>
#include <thread>
// #include <bits/stdc++.h>
using namespace std;

int l_wzietych, n;
string wej;
int l_udzialow;
vector<int> wyn;
int main()
{
    std::ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin >> n;
    for (int i = 1; i <= n; i++)
    {
        cin >> wej >> l_udzialow;
        if (l_wzietych == 20)
            continue;
        if (wej[0] == 'N')
            continue;

        if (l_wzietych < 10 || l_udzialow < 2)
        {
            l_wzietych++;
            wyn.push_back(i);
        }
    }

    for (auto x : wyn)
        cout << x << " ";
}