#include <iostream>
using namespace std;

int main()
{
	long ans = 0;
	char a[1000000000];
	for (int i = 0; i < 1000000000; i++) {
		cin >> a[i];
		if (a[i] == '1' || '2' || '3' || '5' || '7') ans += 2;
		else if (a[i] == '0' || '4' || '6' || '9')ans += 3;
		else if (a[i] == '8')ans += 4;
		else break;
	}
	ans++;
	cout << ans << endl;
    return 0;
}