#include <bits/stdc++.h>
#define itn int
#define nit int
#define nti int
#define tni int
#define tin int
using namespace std;
char a[202];
int ans=0;
int main(){
	//	freopen("a.in.txt","r",stdin);
	//	freopen("ans.out","w",stdout);
	for(int i=0;;i++){
		cin>>a[i];
		if(a[i]=='\n'){
			break;
		}
		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'){
			ans+=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'){
			ans+=2;
		}else if(a[i]=='z'||a[i]=='s'){
			ans+=4;
		}else{
			ans+=3;
		}
	}
	cout<<ans;
	return 0;
}

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