#include<bits/stdc++.h>
#define TASKNAME "codeforce"
#define pb push_back
#define pli pair<int,int>
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;
using ll=long long;
const ll maxN=5005;
const ll inf=1e18;
long long mn2[5005][5005],mn1[5005][5005];
long long k,n,m,a,b,s[maxN],v[103],t[maxN];
long long dp[5005][5005];
void update(ll i,ll j,long long val)
{
mn1[i][j]=max(mn1[i][j-1],val);
mn2[i][j]=max(mn2[i-1][j],val);
dp[i][j]=max(dp[i-1][j],dp[i][j-1]);
dp[i][j]=max(dp[i][j],1ll*val);
}
void solve()
{
cin >> k >> n >> m >> a >> b;
for(int i=1;i<=k;i++) cin >> v[i];
for(int i=1;i<=n;i++) cin >> s[i];
for(int i=1;i<=m;i++) cin >> t[i];
dp[0][0]=mn1[0][0]=mn2[0][0]=-inf;
for(int i=1;i<=n;i++)
{
dp[i][0]=dp[0][i]=mn1[i][0]=mn1[0][i]=mn2[0][i]=mn2[i][0]=-inf;
}
long long ans=-inf;
for(int i=1;i<=n;i++)
{
for(int j=1;j<=m;j++)
{
if(s[i]==t[j])
{
if(i<=1||j<=1) dp[i][j]=-inf;
dp[i][j]=max(dp[i][j],1ll*v[s[i]]+(a*(j>1)+b*(j-1)));
ll x;
x=mn1[i-1][j-1];
dp[i][j]=max(dp[i][j],1ll*x+i*b+j*b-2*b+a+v[s[i]]);
x=mn2[i-1][j-1];
dp[i][j]=max(dp[i][j],1ll*x+i*b+j*b-2*b+a+v[s[i]]);
if(i>=2&&j>=2)
{
x=dp[i-2][j-2];
dp[i][j]=max(dp[i][j],1ll*x+i*b+j*b-2*b+2*a+v[s[i]]);
}
}
else
{
dp[i][j]=-inf;
}
dp[i+1][j+1]=dp[i][j]+v[s[i+1]];
ans=max(ans,1ll*dp[i][j]+(a*(m>j)+b*(m-j)));
update(i,j,dp[i][j]-b*i-b*j);
}
}
cout << ans;
}
int main()
{
fastio
//freopen(TASKNAME".INP","r",stdin);
//freopen(TASKNAME".OUT","w",stdout);
solve();
}
