#include<bits/stdc++.h>
using namespace std;
char c[205];
int ans;
int main(){
    gets(c);
    for(int i=0;i<strlen(c);i++){
        if(c[i]=='a'||c[i]=='d'||c[i]=='g'||c[i]=='j'||c[i]=='m'||c[i]=='p'||c[i]=='t'||c[i]=='w'||c[i]==' ')
        ans+=1;
        else
        if(c[i]=='b'||c[i]=='e'||c[i]=='h'||c[i]=='k'||c[i]=='n'||c[i]=='q'||c[i]=='u'||c[i]=='x')
        ans+=2;
        else
        if(c[i]=='c'||c[i]=='f'||c[i]=='i'||c[i]=='l'||c[i]=='o'||c[i]=='r'||c[i]=='v'||c[i]=='y')
        ans+=3;
        else
        ans+=4;
    }
    cout<<ans;
    return 0;
}