Vowel or Digit

using System;


namespace Learning
{
    class Program
    {
        static void Main()
        {
            try
            {
                string symbol = Console.ReadLine();

                if (symbol == "a" || symbol == "e" || symbol == "i" || symbol == "o" || symbol == "u")
                {
                    Console.WriteLine("vowel");
                    return;
                }
                else
                {
                    int digit = int.Parse(symbol);
                    Console.WriteLine("digit");
                }

            }
            catch (Exception)
            {
                Console.WriteLine("other");
            }
        }

    }
}