#include<iostream>
#include<cstring>
using namespace std;
int main(){
    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};
    string n;
    cin>>n;
    int l=n.length();
    int c=0;
    for(int i=0;i<l;i++){
        if(n[i]>='a'&&n[i]<='z'){
            c+=a[n[i]-'a'];
        }
        if(n[i]==' ') c++;
    }
    cout<<c;
	return 0;
}