#include<bits/stdc++.h>
using namespace std;
using ll=long long;

int main(){
  string s;
  cin>>s;
  ll n=s.size();
  bool ok=true;
  for(ll i=0;i<n;i++){
    if(s[i]!='9'){
      ok=false;
    }
  }
  if(ok){
    cout<<"Yes"<<endl;
  }else{
    cout<<"No"<<endl;
  }
}