using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Do you want to know how old you are in dog years?");

        string Humantodog = Console.ReadLine();

            if (Humantodog.Contains("yes") == true)

        Console.WriteLine("ok, how old are you?");

        if (Humantodog.Contains("yes") == false)

            Console.WriteLine("ok, bye!");

        string one = Console.ReadLine();

        int two = Convert.ToInt32(one) / 7; 

        Console.WriteLine(two);

        Console.WriteLine("thats how old you are in dog years!");

        return;

    }

}