using System;

public class Program

{

    public static void Main()

    {

        var s=Console.ReadLine();

        if(s=="banana" || s=="apple" || s=="kivi"|| 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");

    }

}