using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _13.Vowel_or_Digit
{
    class Program
    {
        static void Main(string[] args)
        {

            char a = Convert.ToChar(Console.ReadLine());

            char[] vowelList = { 'a', 'e', 'i', 'o', 'u' };
            foreach (char vowel in vowelList)
            {
                if (vowel == a)
                {
                    Console.WriteLine("vowel");
                    return;
                }
            }
            if (char.IsNumber(a))
            {
                Console.WriteLine("digit");
            }
            else
            {
                Console.WriteLine("other");
            }
        }
    }
}