#include<bits/stdc++.h>
#include<atcoder/all>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
using namespace atcoder;
typedef long long ll;
typedef vector<int> vi;
typedef vector<long long> vl;
typedef vector<vector<int>> vvi;
typedef vector<vector<long long>> vvl;
typedef pair<int,int> P;
typedef long double ld;

int main(){
	string s;
	cin >> s;
	int n = s.size();
	string ans = "Yes";
	rep(i, n) if(s[i] != '9') ans = "No";
	cout << ans << "\n";
	return 0;
}