#include <cstdio>
#include <functional>
#include <queue>
#include <vector>
using namespace std;

int main()
{
    int N, M;
    scanf("%d%d", &N, &M);
    vector<vector<int>> adj(N);
    for (int i = 0; i < M; i++)
    {
        int u, v;
        scanf("%d%d", &u, &v);
        adj[u - 1].push_back(v - 1);
        adj[v - 1].push_back(u - 1);
    }
    vector<int> R(N), B(N);
    for (int &r : R)
        scanf("%d", &r);
    for (int &b : B)
        scanf("%d", &b);

    vector<bool> vis(N);

    long ans = 0;

    auto solve = [&](int a)
    {
        long ans = 0, n1 = 0, n2 = 0;
        vector<int> target;
        function<void(int, bool)> dfs = [&](int a, bool b)
        {
            vis[a] = true;
            target.push_back(a);
            ans += max(R[a], B[a]);
            n1 += b ? R[a] : B[a];
            n2 += b ? B[a] : R[a];
            for (auto x : adj[a])
                if (!vis[x])
                    dfs(x, !b);
        };
        dfs(a, true);

        long sav = ans - max(n1, n2);

        for (int u : target)
        {
            using T = tuple<long, int, bool>;
            priority_queue<T, vector<T>, greater<T>> Q;
            Q.emplace(max(R[u], B[u]) - R[u], u, true);
            vector<bool> vis[2] = {vector<bool>(N), vector<bool>(N)};
            while (!Q.empty())
            {
                auto [d, v, t] = Q.top();
                Q.pop();
                if (vis[t][v])
                    continue;
                vis[t][v] = true;
                if (!t && v == u)
                {
                    sav = min(sav, d - (max(R[u], B[u]) - min(R[u], B[u])));
                    break;
                }

                for (auto x : adj[v])
                    Q.emplace(d + max(R[x], B[x]) - (!t ? R[x] : B[x]), x, !t);
            }
        }

        return ans - sav;
    };

    for (int i = 0; i < N; i++)
        if (!vis[i])
            ans = max(ans, solve(i));

    printf("%ld\n", ans);
}