#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,n) for(int i=0;i<(int)(n);i++)

int main(){
	string s;
	cin>>s;
	for(char c:s){
		if(c!='9'){
			cout<<"No\n";
			return 0;
		}
	}
	cout<<"Yes\n";
}