#include <bits/stdc++.h>
using namespace std;
// #include <atcoder/all>
// using namespace atcoder;

using ll = long long;

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