#include <iostream>
#include <string>

using namespace std;

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

	int ans = s.size() * 2 + 1;

	for (auto c : s) {
		switch (c - '0') {
			case 8:
				ans += 2;
				break;
			case 0: case 4: case 6: case 9:
				ans += 1;
				break;
			default:
				break;
		}
	}

	cout << ans << endl;
	return 0;
}