Append - Lists

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//Write a program to append several lists of numbers.
//   Lists are separated by ‘|’.
//   Values are separated by spaces (‘ ’, one or several)
//   Order the lists from the last to the first, and their values from left to right.
//•   Create a new empty list for the results.
//•   Split the input by ‘|’ into array of tokens.
//•   Pass through each of the obtained tokens from tight to left.
//o For each token, split it by space and append all non-empty tokens to the results.
//•   Print the results.

namespace Append_list
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> input = Console.ReadLine().Split('|').ToList();
            input.Reverse();
            List<string> result = new List<string>();
            foreach (var item in input)
            {
                List<string> nums = item.Split(' ').ToList();
                foreach (string num in nums)
                {
                    if (num != "")
                    {
                        result.Add(num);
                    }
                }
            }
            Console.WriteLine(string.Join(" ", result));
        }
    }
}