#include<iostream>
#include<vector>

using namespace std;

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

    return 0;
}