($n,$k)=glob<>;
for(<>){
	($s,$p,$u)=glob<>;
	push@{$a[$s]{$u}//=[]},$p*2e5+$i;
	++$i;
}
for(reverse@a){
	for$u(keys%$_){
		@{$_->{$u}}=sort{$b-$a}@{$_->{$u}};
	}
	
	while(1){
		$w=0;
		for$u(keys%$_){
			if($v{$u}){
				--$v{$u};
				$w=1 if @{$_->{$u}};
			}else{
				if(@{$_->{$u}}){
					push@b,pop@{$_->{$u}};
				}else{
					++$v{$u};
				}
			}
		}
		redo if !@b && $w;
		last if !@b;
		@b=sort{$b-$a}@b;
		while(@b){
			print pop(@b)%2e5,$/;
			exit if !--$k;
		}
	}
}