#include <bits/stdc++.h> 
using namespace std;
using ll =long long;
#define all(v) v.begin(),v.end()
 #define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)

ll INF=2e18;


int main() {
    ios::sync_with_stdio(false);
  cin.tie(0);
string N;cin>>N;
for(auto x:N) {
  if(x!='9') {
    cout<<"No"<<endl;
    return 0;
  }
}
cout<<"Yes"<<endl;
}