import java.io.*; import java.util.*; import java.text.*; import java.math.*; import java.util.regex.*; public class Solution { public static void main(String[] args) { Scanner in = new Scanner(System.in); int h[] = new int[26]; for(int h_i=0; h_i < 26; h_i++){ h[h_i] = in.nextInt(); } String word = in.next(); char ch[]=word.toCharArray(); int max_height=Integer.MIN_VALUE; for(int i=0;imax_height) max_height=height; } int res=max_height*(ch.length); System.out.println(res); } }