#!/usr/bin/env python3

import collections
import heapq


def team_key(team):
    return (-team[0], team[1], team[2], team[3])


def main():
    n, k = map(int, input().split())
    data = [tuple(map(int, input().split())) for _ in range(n)]
    univ = collections.defaultdict(list)
    for i in range(n):
        u = data[i][2]
        univ[u].append(i)
    local_ranks = [-1 for _ in range(n)]
    for v in univ.values():
        v.sort(key=lambda i: (-data[i][0], data[i][1]))
        for r, i in enumerate(v):
            local_ranks[i] = r
    ts = [(data[i][0], local_ranks[i], data[i][1], i) for i in range(n)]
    if k < n // 3:
        print(*(t[-1] for t in heapq.nsmallest(k, ts, key=team_key)), sep="\n")
    else:
        ts.sort(key=team_key)
        print(*(t[-1] for t in ts[:k]), sep="\n")


if __name__ == '__main__':
    main()