using System;

public class Program

{

    public static void Main()

    {

        var s = Console.ReadLine();

        if (s == "banana" || s == "apple" || s == "kiwi" || s == "cherry" || s == "lemon" || s == "grapes")

            { Console.WriteLine("fruit"); }

        else if (s == "tomato" || s == "cucumber" || s == "pepper" || s == "carrot")

            { Console.WriteLine("vegetable"); }

        else

            { Console.WriteLine("unknown"); }

    }

}