#include<bits/stdc++.h>
using namespace std;
int main(){
int n=0;
string s;
getline(cin,s);
for(int i=0;i<s.size();i++)
{
if(s[i]=='a'||s[i]=='d'||s[i]=='g'||s[i]=='j'||s[i]=='m'||s[i]=='p'||s[i]=='t'||s[i]=='w'||s[i]==' ')
n++;
if(s[i]=='b'||s[i]=='e'||s[i]=='h'||s[i]=='k'||s[i]=='n'||s[i]=='q'||s[i]=='u'||s[i]=='x')
n+=2;
if(s[i]=='c'||s[i]=='f'||s[i]=='i'||s[i]=='l'||s[i]=='o'||s[i]=='r'||s[i]=='v'||s[i]=='z')
n+=3;
if(s[i]=='s'||s[i]=='z')
n+=4;
}
cout<<n;
return 0;
}