AppendArrays

using System;
using System.Collections.Generic;
using System.Linq;

namespace AppendArrays
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> numbers = Console.ReadLine()
             .Split('|')
             .Reverse()
             .ToList();
            List<int> newNumbers = new List<int>();

           foreach (string element in numbers)
            {
                newNumbers.AddRange(element.Split(" ", StringSplitOptions.RemoveEmptyEntries)
                .Select(int.Parse)
                .ToList()
                );
            }
            Console.Write(string.Join(' ', newNumbers));
        }
    }
}