import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.StringTokenizer;

public class Main {

    static BufferedReader in;
    static PrintWriter out;
    static StringTokenizer tok;

    void solve() throws IOException {
        int n = ni();
        int k = ni();

        ArrayList<Team> list = new ArrayList<>();
        int[] cnt = new int[100000];

        for (int i = 0; i < n; i++) {
            int s = ni();
            int p = ni();
            int u = ni() - 1;

            list.add(new Team(s, p, u, i));
            cnt[u]++;
        }

        Collections.sort(list, (t1, t2) -> t1.s != t2.s ? t2.s - t1.s : cnt[t1.u] != cnt[t2.u] ? cnt[t1.u] - cnt[t2.u] : t1.p - t2.p);

        for (int i = 0; i < k; i++) {
            out.println(list.get(i).i);
        }
    }

    class Team {
        int s, p, u, i;

        public Team(int s, int p, int u, int i) {
            this.s = s;
            this.p = p;
            this.u = u;
            this.i = i;
        }
    }

    String ns() throws IOException {
        while (!tok.hasMoreTokens()) {
            tok = new StringTokenizer(in.readLine(), " ");
        }
        return tok.nextToken();
    }

    int ni() throws IOException {
        return Integer.parseInt(ns());
    }

    long nl() throws IOException {
        return Long.parseLong(ns());
    }

    double nd() throws IOException {
        return Double.parseDouble(ns());
    }

    String[] nsa(int n) throws IOException {
        String[] res = new String[n];
        for (int i = 0; i < n; i++) {
            res[i] = ns();
        }
        return res;
    }

    int[] nia(int n) throws IOException {
        int[] res = new int[n];
        for (int i = 0; i < n; i++) {
            res[i] = ni();
        }
        return res;
    }

    long[] nla(int n) throws IOException {
        long[] res = new long[n];
        for (int i = 0; i < n; i++) {
            res[i] = nl();
        }
        return res;
    }

    public static void main(String[] args) throws IOException {
        in = new BufferedReader(new InputStreamReader(System.in));
        out = new PrintWriter(System.out);
        tok = new StringTokenizer("");
        Main main = new Main();
        main.solve();
        out.close();
    }
}