#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>

int main(){
    int a[10],area,max,h[26],i;
    char s[10];
    
    for(i = 0; i < 25; i++){
       scanf("%d",&h[i]);
    }
    char* word = (char *)malloc(512000 * sizeof(char));
    scanf("%s",word);
    for(int i=0;i<20;i++)
    {s[i]=word[i];}
    for(int i=0;i<20;i++)
        {if(s[i]=='a')
        {a[i]=h[0];}
        else if(s[i]=='b')
            {a[i]=h[1];
         }
         else if(s[i]=='c')
            {a[i]=h[2];
         } else if(s[i]=='d')
            {a[i]=h[3];
         } else if(s[i]=='e')
            {a[i]=h[4];
         } else if(s[i]=='f')
            {a[i]=h[5];
         } else if(s[i]=='g')
            {a[i]=h[6];
         } else if(s[i]=='h')
            {a[i]=h[7];
         } else if(s[i]=='i')
            {a[i]=h[8];
         } else if(s[i]=='j')
            {a[i]=h[9];
         } else if(s[i]=='k')
            {a[i]=h[10];
         } else if(s[i]=='l')
            {a[i]=h[11];
         } else if(s[i]=='m')
            {a[i]=h[12];
         } else if(s[i]=='n')
            {a[i]=h[13];
         } else if(s[i]=='o')
            {a[i]=h[14];
         } else if(s[i]=='p')
            {a[i]=h[15];
         }else if(s[i]=='q')
         {a[i]=h[16];}else if(s[i]=='r')
         {a[i]=h[17];}else if(s[i]=='s')
         {a[i]=h[18];}else if(s[i]=='t')
         {a[i]=h[19];}
         else if(s[i]=='u')
         {a[i]=h[20];}
         else if(s[i]=='v')
         {a[i]=h[21];}
         else if(s[i]=='w')
         {a[i]=h[22];}
             else if(s[i]=='x')
             {a[i]=h[23];}
         else if(s[i]=='y')
            {a[i]=h[24];}else if(s[i]=='z')
         {a[i]=h[25];}}
         max=a[0];
         for(int i=0;i<20;i++)
             {if(a[i]>a[0])
             max=a[i];
         }
         area=max*3;
         printf("%d",area);
   
    
        
   if(area<0)
         return 0;
        }