#include <cmath> #include <cstdio> #include <vector> #include <iostream> #include <algorithm> using namespace std; int main() { vector<int> hs('z' - 'a' + 1, 0); for(auto & h : hs) { cin >> h; } string s; cin >> s; auto const W = s.size(); auto H = 0; for(auto const & c : s) { H = max(H, hs[c - 'a']); } cout << W * H << endl; return 0; }