using System.Data;
using System.Numerics;

public class Program
{
    public static void Main()
    {

        //int num = int.Parse(Console.ReadLine() ?? string.Empty);
        //string[] str = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        //string str = Console.ReadLine() ?? string.Empty;

        BigInteger num = BigInteger.Parse(Console.ReadLine() ?? string.Empty);

        if (num.ToString()[num.ToString().Length - 1] == '9'&& num.ToString()[0] =='9')
        {
            Console.WriteLine("Yes");
        }
        else
        {
            Console.WriteLine("No");
        }


    }

}