package yukicoder;

import java.util.Arrays;
import java.util.HashSet;
import java.util.Scanner;

public class No509 {
    public static void main(String[] args) {
        String n = new Scanner(System.in).next();
        char[] nC = n.toCharArray();
        HashSet<Character> more1 = new HashSet<>();
        int cnt;

        cnt = n.length() + 1;
        more1.addAll(Arrays.asList('0', '4', '6', '9'));

        for(char each : nC) {
            if( more1.contains(each) ) cnt++;
            if(each == '8') cnt += 2;
        }
        cnt += n.length();

        System.out.println(cnt);
    }
}