#include <stdio.h>
#include <stdlib.h>
int p[30010], rank[30010], m, n;

int find(int x){
	if(p[x] != x)
		p[x] = find(p[x]);
	return p[x];
}

void make(int a, int b){
	int min, max;
	a = find(a);
	b = find(b);
	min = a > b ? b : a;
	max = a > b ? a : b;
	p[max] = min;
}
int cmp(const void* a, const void* b){
	return *(int*)a - *(int*)b;
}
int main(){
	int i, j, k, a, b;
	while(scanf("%d%d", &n, &m), n || m){
		for(i = 0; i <= n; i++){
			p[i] = i;
		}
		for(i = 0; i < m; i++){
			scanf("%d", &k);
			for(j = 0; j < k; j++){
				scanf("%d", &a);
				if(j)make(b, a);
				b = a;
			}
		}
		qsort(p, n, sizeof(p[0]), cmp);n = 0; m = 0;
		while(!p[n++])m++;
		printf("%d\n", m);
	}
	return 0;
}