#include<bits/stdc++.h>
using namespace std;
int a[30] = {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};
int main(){
	string s;
	long long sum = 0;
	getline(cin,s);
	int n = s.size();
	for(int i = 0;i < n;i++){
		if(s[i] == ' '){
			sum++;
		}
		else{
			sum = sum + a[s[i] - 'a'];
		}
	}
	cout << sum;
	return 0;
}