import java.util.*;
import java.io.*;

public class Main {
    public static void main(String[] args) throws Exception {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String n = br.readLine();
        
        for(int i = 0 ; i < n.length() ; i++){
            char c = n.charAt(i);
            if(c != '9'){
                System.out.print("No");
                return;
            }
        }
        
        System.out.print("Yes");

    }

}