#include<fstream>
#include<algorithm>
using namespace std;
int t,n,i,j,maxim,l[3501],v[3501];
struct cutie
{
	int l,L,h;
};
cutie a[3501];
int cmp(cutie a,cutie b)
{
	return ((a.l<b.l)||(a.l==b.l&&a.L<b.L)||(a.l==b.l&&a.L==b.L&&a.h<b.h));
}

int main()
{
	ifstream f("cutii.in");
	ofstream g("cutii.out");
	
	f>>n>>t;
	while(t)
	{
		--t;
		maxim=0;
		for(i=1;i<=n;++i)
			f>>a[i].l>>a[i].L>>a[i].h;	
		sort(a+1,a+n+1,cmp);
		
		l[n]=v[n]=1;
		for(i=n-1;i>=1;--i)
		{
			l[i]=1;
			for(j=i+1;j<=n&&v[j]>=l[i];++j)
				if(a[i].l<a[j].l&&a[i].L<a[j].L&&a[i].h<a[j].h&&l[i]<l[j]+1)
					l[i]=l[j]+1;
				v[i]=max(v[i+1],l[i]);
		}
		g<<v[1]<<'\n';
		//for(i=1;i<=n;++i)
			//printf("%d ",v[i]);
	}
	return 0;
}