($n,$k)=glob<>;
for(<>){
	($s,$p,$u)=glob<>;
	push@{$a[$s]{$u}//=[]},$p*1e5+$i;
	++$i;
}
for(reverse@a){
	for$u(keys%$_){
		@{$_->{$u}}=sort{$a-$b}@{$_->{$u}};
	}
	while(1){
		for$u(keys%$_){
			push@b,shift@{$_->{$u}} if @{$_->{$u}};
		}
		last if !@b;
		@b=sort{$a-$b}@b;
		while(@b){
			print pop(@b)%1e5,$/;
			exit if !--$k;
		}
	}
}