#include <stdio.h>
#include <string.h>
int main()
{
    char s[1000000];
    int ans=0;
    fgets(s,1000000,stdin);
    for(int i=0;i<strlen(s);i++)
    {
    	if(s[i]=='a'||s[i]=='d'||s[i]=='g'||s[i]=='j'||s[i]=='m'||s[i]=='p'||s[i]=='t'||s[i]=='w'||s[i]==' ')
    	ans++;
    	if(s[i]=='b'||s[i]=='e'||s[i]=='h'||s[i]=='k'||s[i]=='n'||s[i]=='q'||s[i]=='u'||s[i]=='x')
    	ans+=2;
    	if(s[i]=='c'||s[i]=='f'||s[i]=='i'||s[i]=='l'||s[i]=='o'||s[i]=='r'||s[i]=='v'||s[i]=='z')
    	ans+=3;
    	if(s[i]=='s'||s[i]=='z')
    	ans+=4;
	}
    printf("%d",ans);
	return 0;
 }