#include <cstdio>
#define nmax 3501
using namespace std;
int x[nmax],y[nmax],z[nmax],i,lis[nmax],j,maxim;
int main()
{
    freopen("cutii.in","r",stdin);
    freopen("cutii.out","w",stdout);
    int t,n;
    scanf("%d%d",&n,&t);
    while(t)
    {
        for(i=1;i<=n;i++)
            scanf("%d%d%d",&x[i],&y[i],&z[i]);
        lis[n]=1;
    for(i=n;i>0;i--)
    {
        maxim=0;
        for(j=i+1;j<=n;j++)
        {
            if(maxim<lis[j]&&x[i]<x[j]&&y[i]<y[j]&&z[i]<z[j])
                maxim=lis[j];
        }
        lis[i]=maxim+1;
    }
    maxim=lis[1];
    for(i=2;i<=n;i++)
    {
        if(lis[i]>maxim)
            maxim=lis[i];
    }
        printf("%d\n",maxim);
        t--;
    }
    return 0;
}