#include <bits/stdc++.h>

#define _overload(_1,_2,_3,name,...) name
#define _rep(i,n) _range(i,0,n)
#define _range(i,a,b) for(int i=int(a);i<int(b);++i)
#define rep(...) _overload(__VA_ARGS__,_range,_rep,)(__VA_ARGS__)

#define _rrep(i,n) _rrange(i,n,0)
#define _rrange(i,a,b) for(int i=int(a)-1;i>=int(b);--i)
#define rrep(...) _overload(__VA_ARGS__,_rrange,_rrep,)(__VA_ARGS__)

#define _all(arg) begin(arg),end(arg)
#define uniq(arg) sort(_all(arg)),(arg).erase(unique(_all(arg)),end(arg))
#define getidx(ary,key) lower_bound(_all(ary),key)-begin(ary)
#define clr(a,b) memset((a),(b),sizeof(a))
#define bit(n) (1LL<<(n))
#define popcount(n) (__builtin_popcountll(n))

using namespace std;

template<class T>bool chmax(T &a, const T &b) { return (a<b)?(a=b,1):0;}
template<class T>bool chmin(T &a, const T &b) { return (b<a)?(a=b,1):0;}

using ll=long long;
using R=long double;
const R EPS=1e-9; // [-1000,1000]->EPS=1e-8 [-10000,10000]->EPS=1e-7
inline int sgn(const R& r){return(r > EPS)-(r < -EPS);}
inline R sq(R x){return sqrt(max<R>(x,0.0));}

const int dx[8]={1,0,-1,0,1,-1,-1,1};
const int dy[8]={0,1,0,-1,1,1,-1,-1};

// Problem Specific Parameter:

using i2=tuple<int,int>;
using i3=tuple<int,int,int>;
int n,k;

const int limit=100000;
int num[limit];
vector<i2> score[11];

int s[100010],p[100010],u[100010];

int main(void){
	cin >> n >> k;
	
	rep(i,n) cin >> s[i] >> p[i] >> u[i],u[i]--;
	rep(i,n) score[s[i]].push_back(i2(p[i],i));

	vector<int> ans;

	rrep(i,11){
		vector<i3> cur; 
		for(auto &it:score[i]){
			int id;
			tie(ignore,id)=it;
			cur.push_back(i3(num[u[id]],p[id],id));
			num[u[id]]++;
		}
		sort(_all(cur));
		for(auto &it:cur) ans.push_back(get<2>(it));
	}
	
	rep(i,k) cout << ans[i] << endl;
	return 0;
}