#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using namespace std;
using ll=long long;
using ld=long double;
ld pie=3.141592653589793;
ll mod=1000000007;
ll inf=1009999999999999990;
int main(){
    string s;
    cin >> s;
    for (ll i = 0; i < s.size(); i++)
    {
        if (s[i]!='9')
        {
            cout << "No" << endl;
            return 0;
        }
    }
    cout << "Yes" << endl;
}