using System;

class Clean
{
    public static void Main()
    {
        string input = Console.ReadLine();

        bool lowerCase = input == "a" || input == "e" || input == "i" || input == "o" || input == "u" || input == "y";
        bool upperCase = input == "A" || input == "E" || input == "I" || input == "O" || input == "U" || input == "Y";

        if (char.IsDigit(Convert.ToChar(input)))
        {
            Console.WriteLine("digit");
        }
        else if (lowerCase || upperCase)
        {
            Console.WriteLine("vowel");
        }
        else
        {
            Console.WriteLine("other");
        }

    }
}