#include <iostream>
#include <string>

using namespace std;

int main() {
    string n;
    cin >> n;

    int retval = 0, size = n.size();

    for (int i = 0; i < size; i++) {
        switch (n[i]) {
            case '0':
            case '4':
            case '6':
            case '9':
                retval++;
                break;
            case '8':
                retval += 2;
                break;
            default:
                break;
        }
    }

    retval += size * 2 + 1;

    cout << retval << endl;

    return 0;
}