#include <iostream> #include <cstdio> #include <cassert> #include <cstring> #include <vector> #include <valarray> #include <array> #include <queue> #include <set> #include <unordered_set> #include <map> #include <unordered_map> #include <algorithm> #include <cmath> #include <complex> #include <random> using namespace std; using uint = unsigned int; using ll = long long; using ull = unsigned long long; template<class T = ll> constexpr T TEN(int n) {return (n==0)?1:10*TEN<T>(n-1);} int main() { int a[26]; for (int i = 0; i < 26; i++) { cin >> a[i]; } string s; cin >> s; int h = -1; for (char c: s) { h = max(h, a[c-'a']); } cout << int(s.size()) * h << endl; return 0; }