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

int main()
{
	int n;
	cin >> n;
	if (n == 0) {
		cout << 4 << endl;
		return 0;
	}
	int res = 1;
	while (n) {
		switch (n % 10)
		{
		case 1:
		case 2:
		case 3:
		case 5:
		case 7:
			res += 2;
			break;
		case 0:
		case 4:
		case 6:
		case 9:
			res += 3;
			break;
		case 8:
			res += 4;
			break;
		}
		n /= 10;
	}
	cout << res << endl;
	return 0;
}