#include <cmath> #include <vector> #include <iostream> #include <limits> #include <iostream> #include <vector> #include <cassert> #include <map> #include <cmath> #include <set> #include <algorithm> #include <queue> using namespace std; int main(){ vector<int> H(26); for(int &v : H) cin >> v; string S; cin >> S; int ma = 0; for(char c : S){ ma = max(ma, H[c-'a']); } cout << (ma * S.size()) << endl; } /* 7 voda yoda vina boda vona beda vino */