#include <stdio.h>
#include <algorithm>
#include <iostream>
#include <string>
#include <vector>
#include <functional>
#include <map>
#include <iomanip>
#include <math.h> 
#include <stack>
#include <queue>
#include <bitset>
#include <cstdlib>
#include <tuple>
#include <cctype>
#include <ctype.h>

using namespace std;

int main() {
	int i, j, k;
	int n;
	string  s;

	cin >> s;

	int sum = 0;

	sum += s.length() * 2 + 1;

	for (i = 0; i < s.length(); i++) {
		if (s[i] == '4' || s[i] == '6' || s[i] == '9' || s[i] == '0') {
			sum++;
		}
		else if (s[i] == '8') {
			sum += 2;
		}
	}

	cout << sum << endl;


	getchar();
	getchar();
	return 0;
}