#include <iostream>
#include <cctype>
using namespace std;

int a = {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 sum = 0;

int main(){
    string c;
    getline(cin, c);
    int len = c.length();
    for(int i = 0; i < len; i++){
        if(isalpha(c[i])) sum+=a[c[i]-'a'];
        else if(c[i]==' ') sum++;
    }
    cout << sum;
    return 0;
}