#include <bits/stdc++.h>
#define int ll
using namespace std;
#define ll long long
#define y1 zck_is_king
#define pii pair<ll, ll>
#define ull unsigned ll
#define f first
#define s second
#define ALL(x) x.begin(),x.end()
#define SZ(x) (int)x.size()
#define SQ(x) (x)*(x)
#define MN(a,b) a = min(a,(__typeof__(a))(b))
#define MX(a,b) a = max(a,(__typeof__(a))(b))
#define pb push_back
#define REP(i,n) for (int i = 0; i<n; ++i)
#define RREP(i,n) for (int i = n-1; i>=0; --i)
#define REP1(i,n) for (int i = 1; i<=n; ++i)
#define SORT_UNIQUE(c) (sort(c.begin(),c.end()), c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
#ifdef BALBIT
#define IOS()
#define bug(...) fprintf(stderr,"#%d (%s) = ",__LINE__,#__VA_ARGS__),_do(__VA_ARGS__);
template<typename T> void _do(T &&x){cerr<<x<<endl;}
template<typename T, typename ...S> void _do(T &&x, S &&...y){cerr<<x<<", ";_do(y...);}
#else
#define IOS() ios_base::sync_with_stdio(0);cin.tie(0);
#define endl '\n'
#define bug(...)
#endif
const int iinf = 1e9+10;
const ll inf = 1ll<<60;
const ll mod = 1e9+7 ;
void GG(){cout<<"0\n"; exit(0);}
ll mpow(ll a, ll n, ll mo = mod){ // a^n % mod
ll re=1;
while (n>0){
if (n&1) re = re*a %mo;
a = a*a %mo;
n>>=1;
}
return re;
}
ll inv (ll b, ll mo = mod){
if (b==1) return b;
return (mo-mo/b) * inv(mo%b,mo) % mo;
}
const int maxn = 5005+5;
ll V[maxn], S[maxn], T[maxn];
ll dp[2][2][maxn][2];
signed main(){
IOS();
int K,n,m,A,B;
cin>>K>>n>>m>>A>>B;
// assert(A == 0 && B == 0);
REP1(i,K) cin>>V[i];
REP1(i,n) cin>>S[i];
REP1(i,m) cin>>T[i];
REP(a,2)REP(b,maxn)REP(c,2) {
dp[0][a][b][c] = -inf;
if (a == 1 && c == 0) dp[0][a][b][c] = A + B * b;
}
dp[0][1][0][1] = 0;
// calculate cost of not even visiting singapore
ll re = (A + B*m);
REP1(i,n) {
int I = i%2;
REP(a,2)REP(b,maxn)REP(c,2) dp[I][a][b][c] = -inf;
dp[I][1][0][1] = 0;
REP1(j, m) {
if (T[j] == S[i]) {
// take
REP(f1, 2) REP(f2, 2)
MX(dp[I][1][j][1], V[S[i]] + dp[I^1][f1][j-1][f2]);
}
// sacrifice S
REP(f2, 2) {
MX(dp[I][0][j][f2], dp[I^1][1][j][f2] + A+B);
MX(dp[I][0][j][f2], dp[I^1][0][j][f2] + 0+B);
}
// sacrifice T
REP(f1, 2) {
MX(dp[I][f1][j][0], dp[I][f1][j-1][1] + A + B);
MX(dp[I][f1][j][0], dp[I][f1][j-1][0] + 0 + B);
}
}
// extract dp[i][?][m][?]
REP(f1,2)REP(f2,2) {
MX(re, dp[I][f1][m][f2]);
}
}
cout<<re<<endl;
}
