#include<stdio.h>
int main()
{
	char a[202]="\0",i,s=0;
	scanf("%[^\n]",a);
	for(i=0;a[i]!='\0';i++)
	{
		if(a[i]==' '||a[i]=='a'||a[i]=='d'||a[i]=='g'||a[i]=='j'||a[i]=='m'||a[i]=='p'||a[i]=='t'||a[i]=='w')
		s++;
		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')
		s=s+2;
		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')
		s=s+3;
		if(a[i]=='s'||a[i]=='z')
		s=s+4;		
	}
	printf("%d",s);
}