#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;
using ll = long long;

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

    int black = s.size(), white = 1;
    for (auto c:s) {
        if (c == '0' || c == '4' || c == '6' || c == '9')white++;
        if (c == '8')white += 2;
    }

    cout << white + black + min(black, white) << endl;
    return 0;
}