using System;
using System.Linq;


namespace ConsoleApp3
{
    class Program
    {
        static void Main(string[] args)
        {
            char[] sz = {'б', 'в', 'г', 'д', 'ж', 'з', 'л', 'м', 'н', 'р'};
            string[] s = Console.ReadLine().Split(new[] {',','.'}, StringSplitOptions.RemoveEmptyEntries).ToArray();
            Console.WriteLine(String.Join(", ", sz.Except(s.Select((item, index) => new { Item = item, Index = index }).Where(n => n.Index % 2 == 0).Select(n => n.Item).SelectMany(x=> x.ToCharArray()))));
        }
    }
}