#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main(void) {
    string s;
    cin >> s;
    int ans = s.size() * 2 + 1;
    for (int i; i < s.size(); i++) {
        switch((int)s[i] - 48) {
            case 0: { ans++; break; }
            case 4: { ans++; break; }
            case 6: { ans++; break; }
            case 8: { ans+=2; break; }
            case 9: { ans++; break; }
        }
    }
    cout << ans << endl;
    return 0;
}