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 n = 26,k=0,area=0;
        int h[] = new int[n];
        for(int h_i=0; h_i < n; h_i++){
            h[h_i] = in.nextInt();
        }
        String word = in.next();
        
        int l = word.length();
        
        for (int i = 0 ; i != word.length() ; i++) {
        char c = word.charAt(i);
        if(c =='j' || c =='k' || c =='l' || c =='m' || c =='n' || c =='o' || c =='p' || c =='q' || c =='r' || c =='s' || c =='t'           || c =='u' || c =='v' || c =='w' || c =='x' || c =='y' || c =='z'){
             k = 5;
             area = k * l;
            break;
        }
          else if( c=='b' || c=='d' || c=='h')
              {
              k=3;
              area = k*l;
              break;
          }
            else if(c=='f')
                {
                k=4;
                area = k*l;
                break;
            }
            else if(c=='i'){
                k=2;
                area = k*l;
                break;
            }
            else 
                {
                k=1;
                area=l;
                
            }
        
}
   
    System.out.println(area);    
    }
    
}