#include <stdio.h>
#include <stdlib.h>
#define maxn 3501

int n, T;
int best[maxn], v[maxn];

struct cutie {
	int x, y, z;
} c[maxn];


int cmp(const void *a, const void *b)
{
	cutie *aa = (cutie *)a, *bb = (cutie *)b;
	if (aa->x - bb->x)
		return aa->x - bb->x;
	if (aa->y - bb->y)
		return aa->y - bb->y;
	return aa->z - bb->z;
}

int main()
{
	int i, j;
	FILE *fin = fopen("cutii.in", "rt"), *fout = fopen("cutii.out", "wt");

	fscanf(fin, "%d %d", &n, &T);
	for (; T; T--)
	{
		for (i = 1; i <= n; i++)
			fscanf(fin, "%d %d %d", &c[i].x, &c[i].y, &c[i].z);
		qsort(c, n + 1, sizeof(cutie), cmp);
		
		for (i = 1; i <= n; i++)
		{
			best[i] = 1;
			for (j = i - 1; j > 0 && v[j] >= best[i]; j--)
				if (c[i].x > c[j].x && c[i].y > c[j].y && c[i].z > c[j].z)
				if (best[i] < best[j] + 1)
					best[i] = best[j] + 1;
			v[i] = best[i] > v[i - 1] ? best[i] : v[i - 1];
		}
		fprintf(fout, "%d\n", v[n]);
	}
	fclose(fin), fclose(fout);
	return 0;
}