#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define llong long long

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

    int inner = 0;
    for(char c: n) {
        if(c == '1' || c == '2' || c == '3' || c == '5' || c == '7') {}
        else if(c == '0' || c == '4' || c == '6' || c == '9') inner += 1;
        else inner += 2;
    }

    int result;
    if(inner + 1 < n.length()) {
        result = (inner + 1) * 2 + n.length();
    } else {
        result = (inner + 1) + n.length() * 2;
    }
    cout << result << endl;
}