package yukicoder;

import java.util.*;

public class Q433 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int K = sc.nextInt();
		int[] S = new int[N];
		int[] P = new int[N];
		String[] U = new String[N];
		for (int i = 0; i < N; ++i) {
			S[i] = sc.nextInt();
			P[i] = sc.nextInt();
			U[i] = sc.next();
		}
		Integer[] ord = new Integer[N];
		for (int i = 0; i < N; ++i) {
			ord[i] = i;
		}
		Arrays.sort(ord, new Comparator<Integer>() {
			@Override
			public int compare(Integer o1, Integer o2) {
				if (S[o1] != S[o2]) {
					return -Integer.compare(S[o1], S[o2]);
				} else {
					return Integer.compare(P[o1], P[o2]);
				}
			}
		});
		int[] C = new int[N];
		HashMap<String, Integer> map = new HashMap<>();
		for (int i = 0; i < N; ++i) {
			if (!map.containsKey(U[ord[i]])) {
				map.put(U[ord[i]], 0);
			} else {
				C[ord[i]] = map.get(U[ord[i]]) + 1;
				map.put(U[ord[i]], map.get(U[ord[i]]) + 1);
			}
		}
		Arrays.sort(ord, new Comparator<Integer>() {
			@Override
			public int compare(Integer o1, Integer o2) {
				if (S[o1] != S[o2]) {
					return -Integer.compare(S[o1], S[o2]);
				} else if (C[o1] != C[o2]) {
					return Integer.compare(C[o1], C[o2]);
				} else if (P[o1] != P[o2]) {
					return Integer.compare(P[o1], P[o2]);
				} else {
					throw new AssertionError();
				}
			}
		});
		for(int i=0;i<K;++i){
			System.out.println(ord[i]);
		}
	}

	static void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}
}