// Success consists of going from failure to failure without loss of enthusiasm
#include <bits/stdc++.h>
using namespace std;
#define nl '\n'
#define pb push_back
#define pf push_front
#define mp make_pair
#define f first
#define s second
#define sz(x) int(x.size())
template<class T> using V = vector<T>;
using pi = pair<int, int>;
using vi = V<int>;
using vpi = V<pi>;
using ll = long long;
using pl = pair<ll, ll>;
using vpl = V<pl>;
using vl = V<ll>;
using db = long double;
template<class T> using pq = priority_queue<T, V<T>, greater<T>>;
const int MOD = 1e9 + 7;
const ll INFL = ll(1e17);
int main() {
cin.tie(0)->sync_with_stdio(0);
int K, N, M, A, B; cin >> K >> N >> M >> A >> B;
vi H(K); for(auto& x : H) cin >> x;
vi S(N); for(auto& x : S) { cin >> x; --x; }
vi T(M); for(auto& x : T) { cin >> x; --x; }
int dp[2][M+1][2], ndp[2][M+1][2];
memset(dp, 0xc0, sizeof(dp));
int ans = -MOD;
for(int x = 0; x <= N; x++) {
memset(ndp, 0xc0, sizeof(ndp));
// can start on any day
dp[1][0][1] = 0;
for(int y = 0; y <= M; y++) for(int ys = 0; ys <= 1; ys++) for(int xs = 0; xs <= 1; xs++) {
if (dp[ys][y][xs] == -MOD) continue;
if (y == M) ans = max(dp[xs][y][ys], ans);
// go to event
if (x < N && y < M && S[x] == T[y]) ndp[1][y+1][1] = max(dp[xs][y][ys] + H[T[y]], ndp[1][y+1][1]);
// skip next event in S (x)
if (x < N) ndp[0][y][ys] = max(dp[xs][y][ys] + B + xs * A, ndp[0][y][ys]);
// skip next event in T (y)
if (y < M) dp[xs][y+1][0] = max(dp[xs][y][ys] + B + ys * A, dp[xs][y+1][0]);
}
for(int y = 0; y <= M; y++) for(int ys = 0; ys <= 1; ys++) for(int xs = 0; xs <= 1; xs++) {
swap(dp[ys][y][xs], ndp[ys][y][xs]);
}
}
cout << ans << nl;
return 0;
}
