import java.util.Scanner;
public class Nuritsubushi {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		StringBuilder n = new StringBuilder(s.next());
		s.close();
		int a = 0,b = 0,c = 0;
		while(n.length() != 0){
			char ch = n.charAt(0);
			n.deleteCharAt(0);
			if(ch == '8'){
				c++;
			}else if(ch == '0' || ch == '4' || ch == '6' || ch == '9'){
				b++;
			}else{
				a++;
			}
		}
		a = a*2 + b*3 + c*4 + 1;
		System.out.println(a);
	}

}