#include<bits/stdc++.h>
using namespace std;
int main(){
	short c[27]={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 s;
	int sum=0;
	getline(cin,s);
	for(int i=0;i<sizeof(s);i++){
		if(s[i]>='a'&&s[i]<='z')sum+=c[s[i]-'a'];
		else if(s[i]==' ')sum++;
	}
	cout<<sum;
}