/*
int       %d
longlong  %lld
float     %f
double    %lf
char      %c
char[]    %s
'a'=97
'z'=122
'A'=65
'Z'=90
'0'=48
'9'=57
*/
#include <iostream>
#include <iomanip>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
const int N=1e5+10;
const int INF=0x3f3f3f3f;
int a[26]={1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,4,1,2,3,1,2,3,4},ans;
string s;
int main(){
	getline(cin,s);
	int len=s.size();
	for(int i=0;i<len;i++){
		if(s[i]==' '){
			ans++;
		}else{
			ans+=a[s[i]-'a']; 
		}
	}
	cout<<ans;
return 0;
}