#include <iostream>
#include <string>
using namespace std;
int num[] = { 1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,4,1,2,3,4 };
int sum = 0;
int main() {
    string str;
    getline(cin, str);
    for (char ch : str) {
        if (ch == ' ') sum++;
        else sum += num[ch - 'a'];
    }
    cout << sum - 1;
    return 0;
}