#include <iostream> #include <cstdio> #include <cstdlib> #include <cmath> #include <cstring> #include <numeric> #include <algorithm> #include <functional> #include <vector> #include <queue> #include <stack> #include <set> #include <map> #include <utility> #include <cassert> #include <iomanip> #include <ctime> using namespace std; const int me = 100025; int a[me]; string s; int main(int argc, const char * argv[]) { ios_base::sync_with_stdio(0); cin.tie(0); for(int i = 0; i < 26; i ++) cin >> a[i]; cin >> s; int l = 0; for(char i : s) l = max(l, a[i - 'a']); cout << (int)s.size() * l << endl; return 0; }