/* -*- coding: utf-8 -*-
 *
 * 2450.cc:  No.2450 99-like Number - yukicoder
 */

#include<cstdio>
#include<algorithm>

using namespace std;

/* constant */

const int MAX_N = 100;

/* typedef */

/* global variables */

char s[MAX_N + 4];

/* subroutines */

/* main */

int main() {
  scanf("%s", s);

  for (char *cpt = s; *cpt; cpt++)
    if (*cpt != '9') {
      puts("No");
      return 0;
    }

  puts("Yes");
  return 0;
}