#include <bits/stdc++.h>
using namespace std;
#define int long long
string s;
int sum;
signed main(){
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]' '){
sum+=1;
}
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'){
sum+=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]'y'){
sum+=3;
}
if(s[i]'s' || s[i]=='z'){
sum+=4;
}
}
cout<<sum;
return 0;
}
