#include<string>
#include<deque>
#include<queue>
#include<vector>
#include<algorithm>
#include<iostream>
#include<set>
#include<cmath>
#include<tuple>
#include<chrono>
#include<functional>
#include<iterator>
#include<random>
using namespace std;
const int maxsei=100001;
int main(void){
	//制約を満たさなければRE
	int n,m;cin>>n>>m;
	if(n<1||100000<n){n/=0;}
	if(m<1||n<m){n/=0;}
	for(int i=0;i<n;i++){
		int x,a,b;cin>>x>>a>>b;
		if(x<0||3<x){x/=0;}
		if(a<0||a>100000){a/=0;}
		if(b<0||b>100000){b/=0;}
	}
	cout<<"ok"<<endl;
	return 0;
}