B

#include <bits/stdc++.h>
using namespace std;

#define ll     long long
#define _test   int _TEST; cin>>_TEST; while(_TEST--)
#define ff     first
#define ss     second
#define pb     push_back

int main()
{
    int n, m;
    cin>>n>>m;

    vector<string> c(n), d(m);
    vector<int> p(m+1);

    for(auto &e: c)     cin>>e;
    for(auto &e: d)     cin>>e;
    for(auto &e: p)     cin>>e;

    map<string, int> mp;

    for(int i=0; i<m; i++)
        mp[d[i]] = i+1;

    ll int ans = 0;

    for(auto e: c)
        ans += p[mp[e]];

    cout<<ans<<"\n";
}