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


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 s;

int main()
{
    cin >> s;
    int ans = 0;
    for (int i = 0; i < s.size(); ++i)
    {
        if (s[i] == ' ') ++ans;
        else if(isalpha(s[i]))  ans += a[s[i]-'a'];
    }
    cout << ans << endl;
    return 0;
}