using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

//大学内順位をつけることで順位をパラメタとしてソートしたりデキューしたりできる!!

namespace yuki_433
{
    class Program
    {
        static int N, K;
        static HashSet<Team> L = new HashSet<Team>();
        static int[] C = new int[100001];

        static void Main(string[] args)
        {
            var sb = new StringBuilder();
            var t = scan;
            N = t[0]; K = t[1];


            for (int i = 0; i < N; i++)
            {
                t = scan;
                L.Add(new Team(i, t[0], t[1], t[2]));
            }

            var A = L.OrderByDescending(l => l.S).ThenBy(l => l.P).ToArray();

            foreach (var a in A)
            {
                a.Urank = C[a.U];
                C[a.U]++;
            }

            A = A.OrderByDescending(l => l.S).ThenBy(l =>l.Urank).ThenBy(l => l.P).ToArray();

            for (int i = 0; i < K; i++)
            {
                sb.AppendLine(A[i].Num.ToString());
            }

            Console.Write(sb);

        }
        class Team
        {
            internal int Num, S, P, U, Urank;
            public Team(int Num, int S, int P, int U)
            {
                this.Num = Num;
                this.S = S;
                this.P = P;
                this.U = U;
                Urank = 0;
            }
        }

        static int[] scan { get { return Array.ConvertAll(Console.ReadLine().Split(), int.Parse); } }
    }
}