#include <iostream>
#include <vector>
#include <algorithm>
#include <queue>
using namespace std;
using i32 = int;
using u32 = unsigned int;
using i64 = long long;
using u64 = unsigned long long;
#define rep(i,n) for(int i=0; i<(int)(n); i++)

template<class T> using nega_queue = priority_queue<T, vector<T>, greater<T>>;

const i64 INF = 1001001001001001001;

int main(){
    int N, M; cin >> N >> M;
    vector<vector<int>> E(N);
    rep(i,M){
        int u,v; cin >> u >> v; u--; v--;
        E[u].push_back(v);
        E[v].push_back(u);
    }

    vector<int> A[2];
    rep(t,2) A[t].resize(N);
    rep(t,2) rep(i,N) cin >> A[t][i];
    
    i64 ans = 0;

    {
        vector<int> C(N, -1);
        C[0] = 0;
        vector<int> bfs = {0};
        rep(i,bfs.size()){
            int p = bfs[i];
            for(int e : E[p]) if(C[e] == -1){
                bfs.push_back(e);
                C[e] = C[p] ^ 1;
            }
        }
        i64 sc[2] = {};
        rep(i,N) rep(t,2) sc[t] = A[C[i]^t][i];
        ans = max(sc[0], sc[1]);
    }

    vector<int> maxA(N);
    rep(i,N) maxA[i] = max(A[0][i], A[1][i]);

    i64 full = 0;
    rep(i,N) full += maxA[i];

    vector<vector<pair<int, int>>> adj(N*2);
    vector<int> cost(N*2);
    rep(t,2) rep(u,N) cost[N*t+u] = maxA[u] - A[t][u];
    rep(u,N) for(int v : E[u]){
        adj[u].push_back(make_pair(N+v, cost[N+v]));
        adj[N+u].push_back(make_pair(v, cost[v]));
    }

    rep(s,N*2){
        int t = (s+N) % (N*2);
        vector<i64> D(N*2, INF);
        nega_queue<pair<i64, int>> Que;
        D[s] = 0;
        Que.push(make_pair(D[s], s));
        while(Que.size()){
            auto [d,p] = Que.top(); Que.pop();
            if(D[p] != d) continue;
            for(auto [to, dd] : adj[p]){
                i64 nxd = d + dd;
                if(D[to] <= nxd) continue;
                D[to] = nxd;
                Que.push(make_pair(D[to], to));
            }
        }
        ans = max(ans, full - D[t]);
    }

    cout << ans << '\n';
    return 0;
}

struct ios_do_not_sync{
    ios_do_not_sync(){
        std::ios::sync_with_stdio(false);
        std::cin.tie(nullptr);
    }
} ios_do_not_sync_instance;