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#include <algorithm>
#include <bitset>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <deque>
#include <iostream>
#include <list>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <vector>

using namespace std;

#define JOIN_(X, Y) X##Y
#define JOIN(X, Y) JOIN_(X, Y)
#define TMP JOIN(tmp, __LINE__)
#define PB push_back
#define SZ(x) int((x).size())
#define REP(i, n) for (int i = 0, TMP = (n); i < TMP; ++i)
#define FOR(i, a, b) for (int i = (a), TMP = (b); i <= TMP; ++i)
#define FORD(i, a, b) for (int i = (a), TMP = (b); i >= TMP; --i)

#ifdef DEBUG
#define DEB(x) (cerr << x)
#else
#define DEB(x)
#endif

typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> pii;
typedef unsigned int uint;

const int INF = 1e9 + 9;

void inline one() {
    int n;
    cin >> n;
    vector<pii> t;
    FOR(i, 1, n) {
        string valid;
        int cnt;
        cin >> valid >> cnt;
        if (valid == "NIE") {
            continue;
        }
        t.emplace_back(i, cnt);
    }
    int left = 20;
    for (const auto &[i, cnt] : t) {
        if (left > 10) {
            cout << i << " ";
            --left;
        } else if (left > 0) {
            if (cnt < 2) {
                cout << i << " ";
                --left;
            }
        } else {
            break;
        }
    }
    cout << "\n";
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    // int z; cin >> z; while(z--)
    one();
}