#include <stdio.h>
#include <string.h>
int main()
{
    char a[201];
    gets(a);
    int i;
    int cnt=0;
    for(i=0;i<strlen(a);i++)
    {
        if(a[i]=='a'||a[i]=='d'||a[i]=='g'||a[i]=='j'||a[i]=='m'||a[i]=='p'||a[i]=='t'||a[i]=='w'||a[i]==' ')
        {
            cnt+=1;
        }
        else if(a[i]=='b'||a[i]=='e'||a[i]=='h'||a[i]=='k'||a[i]=='n'||a[i]=='q'||a[i]=='u'||a[i]=='x')
        {
            cnt+=2;
        }
        else if(a[i]=='c'||a[i]=='f'||a[i]=='i'||a[i]=='l'||a[i]=='o'||a[i]=='r'||a[i]=='v'||a[i]=='y')
        {
            cnt+=3;
        }
       else
        {
            cnt+=4;
        }
    }
    printf("%d",cnt);
    return 0;
}