#include<iostream>
#include<string>
using namespace std;

int cir(string a) {
	int ch=0,i=0;

	while (a[i] != '\0') {
		
		switch (a[i]) {
		case '0':ch++;
			break;
		case '4':ch++;
			break;
		case '6':ch++;
			break;
		case '8':ch+=2;
			break;
		case '9':ch++;
			break;
		}
		i++;
	}
	return ch;
}

int numc(string a) {
	int ch=0;
	ch += (a.size()*2)+1;
	ch += cir(a);
	return ch;
}

int main() {
	string num;
	cin >> num;
	cout << numc(num)<< endl;
	
	return 0;
}