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

int main(){
   int n=26;
    int i,j,count=0,k=1;
//scanf("%d",&n);
    int h[26];
    for(int h_i = 0; h_i < n; h_i++){
       scanf("%d",&h[h_i]);
    }
    char* word = (char *)malloc(512000 * sizeof(char));
    scanf("%s",word);
    
   for(i=0,j=i+1;i<n,j<n-i;i++,j++)
        
        

            {
            if((h[i]-h[j])==abs(k)||count==0)
                {
                  count++;
                k=h[j]-h[i];
            }
        }
          
    printf("%dmm",3*count);
    }
  /*  printf("%d",n);
    for(i=0;i<n;i++)
        { 
        printf("%d",h[i]);
     }
*/