#include<bits/stdc++.h>
#include<atcoder/maxflow>
using namespace std;
using ll = long long;
#define rep(i,l,r)for(int i=(l);i<(r);i++)

int main(){
	int n,m;
	cin >> n >> m;
	vector<ll>c(n);
	rep(i,0,n)cin >> c[i];
	vector<ll>a(m);
	rep(i,0,m)cin >> a[i];
	vector<vector<int>>level(m,vector<int>(n, 1));
	rep(i,0,m) {
		int K, x; cin >> K; rep(j, 0, K) {
			cin >> x; level[i][--x] = 2;
		}
	}
	vector<vector<int>>skill(n,vector<int>(3));
	rep(i,0,n)rep(j,0,2)skill[i][j+1]=2*i+j;
	vector<int>achieve(m);
	rep(i,0,m)achieve[i]=2*n+i;
	int source=2*n+m;
	int sink=2*n+m+1;
	
	const ll INF=(ll)1e18;
	atcoder::mf_graph<ll> g(2*n+m+2);
	rep(i,0,n)rep(j,2,2+1)g.add_edge(source,skill[i][j],c[i]);
	rep(i,0,m)g.add_edge(achieve[i],sink,a[i]);
	rep(i,0,n)rep(j,1,1+1)g.add_edge(skill[i][j],skill[i][j+1],INF);
	rep(i,0,m)rep(j,0,n)g.add_edge(skill[j][level[i][j]],achieve[i],INF);
	ll ret=g.flow(source,sink);
	ll ans=0;
	rep(i,0,m)ans+=a[i];
	cout << ans-ret << endl;
}