import std.conv, std.functional, std.range, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.complex, std.container, std.math, std.numeric, std.regex, std.typecons;
import core.bitop;

class EOFException : Throwable { this() { super("EOF"); } }
string[] tokens;
string readToken() { for (; tokens.empty; ) { if (stdin.eof) { throw new EOFException; } tokens = readln.split; } auto token = tokens.front; tokens.popFront; return token; }
int readInt() { return readToken.to!int; }
long readLong() { return readToken.to!long; }
real readReal() { return readToken.to!real; }

bool chmin(T)(ref T t, in T f) { if (t > f) { t = f; return true; } else { return false; } }
bool chmax(T)(ref T t, in T f) { if (t < f) { t = f; return true; } else { return false; } }

int binarySearch(alias pred, T)(in T[] as) { int lo = -1, hi = cast(int)(as.length); for (; lo + 1 < hi; ) { const mid = (lo + hi) >> 1; (unaryFun!pred(as[mid]) ? hi : lo) = mid; } return hi; }
int lowerBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a >= val)); }
int upperBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a > val)); }


int N, K;
int[] S, P, U;

void main() {
  try {
    for (; ; ) {
      N = readInt();
      K = readInt();
      S = new int[N];
      P = new int[N];
      U = new int[N];
      foreach (i; 0 .. N) {
        S[i] = readInt();
        P[i] = readInt();
        U[i] = readInt();
      }
      
      const limU = U.maxElement + 1;
      alias Team = Tuple!(int, "s", int, "c", int, "p", int, "id");
      auto tss = new Team[][limU];
      foreach (i; 0 .. N) {
        tss[U[i]] ~= Team(-S[i], 0, P[i], i);
      }
      auto cs = new int[N];
      foreach (u; 0 .. limU) {
        tss[u].sort;
        foreach (j; 0 .. cast(int)(tss[u].length)) {
          cs[tss[u][j].id] = j;
        }
      }
      auto teams = new Team[N];
      foreach (i; 0 .. N) {
        teams[i] = Team(-S[i], cs[i], P[i], i);
      }
      teams.sort;
      foreach (i; 0 .. K) {
        writeln(teams[i].id);
      }
    }
  } catch (EOFException e) {
  }
}