using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

       Console.WriteLine(isPhoneNumber("09820689277"));

    }

       static bool isPhoneNumber(string number)

    {

​

        return number[0] == '0' && number[1] == '9' && number.Length > 10 && number.All(char.IsDigit);

    }

}