#include <iostream>
using namespace std;

int main(void){
    string N;
    cin >> N;
    for (int i = 0; i < (int)N.size(); i++) {
        if (N[i] != '9') {
            cout << "No" << endl;
            return 0;
        }
    }
    cout << "Yes" << endl;
    return 0;
}