4 4
1 1
1 2
1 3
1 4
2 4
3 1 2 3
4 1 2 3 4

15
2

#include <map>
#include <set>
#include <list>
#include <queue>
#include <stack>
#include <vector>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <iostream>
#include <algorithm>

using namespace std;

int jihe[2222];
bool vis[33333];
int ans, n;

void dfs(int x, int v)
{
	for (int i = 1; i <= n; ++i)
	{
		if (vis[v | jihe[i]] || i == x)
		{
			continue;
		}
		vis[v | jihe[i]] = 1;
		ans++;
		dfs(i, v | jihe[i]);
	}
}

int main()
{
	int m, k, pos;
	while (~scanf("%d%d", &n, &m))
	{
		memset (vis, 0, sizeof(vis));
		memset (jihe, 0, sizeof(jihe));
		ans = 0;
		for (int i = 1; i <= n; ++i)
		{
			scanf("%d", &k);
			for (int j = 0; j < k; ++j)
			{
				scanf("%d", &pos);
				jihe[i] |= (1 << pos);
			}
			if (vis[jihe[i]])
			{
				continue;
			}
			vis[jihe[i]] = 1;
			ans++;
		}
		for (int i = 1; i <= n; ++i)
		{
			dfs(i, jihe[i]);
		}
		printf("%d\n", ans);
	}
	return 0;
}