using System;

public class Program

{

    public static char Vehicle (int num)

    {

    if (num == 4) return 'c';

    if (num == 8) return 'b';

    else return 'n';    

    }

    public static void Main()

    {

        Console.WriteLine("4 -------->>>>>>>>>>>>>>>>>> "+Vehicle(4));

        Console.WriteLine("8 -------->>>>>>>>>>>>>>>>>> "+Vehicle(8));

        Console.WriteLine("11 -------->>>>>>>>>>>>>>>>>> "+Vehicle(11));

    }

}