#include <bits/stdc++.h>
using namespace std;
int main(){
	string  s ;
	int f,d=0,g,l;
	getline(cin,s);
	for(int i=0;i<=s.length()-1;i++){
		if(s[i]=='v'||s[i]=='y')d=d+3;
		else if(s[i]=='u'||s[i]=='x')d=d+2;
		else if(s[i]=='t'||s[i]=='w')d++;
		else if(s[i]=='s'||s[i] =='z'){
			d=d+4;
		}
		else if(s[i]==32){
		d++;l++;}
		else {
		f=s[i]-96;
		if(f%3!=0)
		g=f%3;
		else 
		g=3;
		d=d+g;
	}}
	cout<<d;
	return 0;
}