#include<stdio.h>

int main()
{
   int num[26]={1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,4,1,2,3,1,2,3,4};
   int i,sum=0;
   char a[205];
   gets(a);
   for(i=0;a[i]!='\0';i++)
   {
       if(a[i]  == ' ')
       sum++;
       else sum += num[a[i]-'a'];
   }
   printf("%d\n",sum);
    return 0;
}