题解 | #游游的数字圈#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        
        // 读取输入字符串
        String t = scanner.nextLine();
        
        int cnt = 0;
        for (int i = 0; i < t.length(); i++) {
            char c = t.charAt(i);
            if (c == '8') {
                cnt += 2;
            } else if (c == '0' || c == '6' || c == '9') {
                cnt++;
            }
        }
        
        // 输出结果
        System.out.println(cnt);
        
        scanner.close();
    }
}