#include<iostream>
#include<cstring>
using namespace std;
int main(){
	char a[100000];
	int n=0;
	gets(a);
	for(int i=0;i<strlen(a);i++){
		if(strcmp(a[i],'a')=0||strcmp(a[i],'d')==0||strcmp(a[i],'g')==0||strcmp(a[i],'j')==0||strcmp(a[i],'m')==0||strcmp(a[i],'p')==0||strcmp(a[i],'t')==0||strcmp(a[i],'w')==0||strcmp(a[i],' ')==0){
			n+=1;
		}else if(strcmp(a[i],'b')=0||strcmp(a[i],'e')=0||strcmp(a[i],'h')=0||strcmp(a[i],'k')=0||strcmp(a[i],'n')=0||a[i]=="q"strcmp(a[i],'q')=0||strcmp(a[i],'u')=0||strcmp(a[i],'x')=0){
			n+=2;
		}else if(strcmp(a[i],'c')=0||strcmp(a[i],'f')=0||strcmp(a[i],'i')==0||strcmp(a[i],'l')==0||strcmp(a[i],'o')==0||strcmp(a[i],'r')==0||strcmp(a[i],'v')==0||strcmp(a[i],'y')==0){
			n+=3;
		}else if(strcmp(a[i],'s')==0||strcmp(a[i],'z')==0){
			n+=4;
		}
	}
	cout<<n;
	return 0;
}