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

namespace Append_Arrays
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> input = Console.ReadLine().Split('|').Select(int.Parse).ToList();
            for (int i = input.Count - 1; i >= 0; i--)
            {
                if (input[i] == null)
                {
                    input.RemoveAt(i); // O(n)
                }
            }
            List <int> newList= new List<int>();
            for (int i = input.Count - 1; i >= 0; i--)
            {
                newList = input[i].ToList();
                foreach (var item in newList)
                {
                    input.Add(item);
                }
            }

        }
    }
}