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");

        }

    }

}