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

namespace _05.TearListInHalf
{
    class Program
    {
        static void Main(string[] args)
        {
            var numbers = Console.ReadLine().Split().Select(int.Parse).ToList();
            var firstPart = new List<int>();
            var secondPart = new List<int>();
            var separated = new List<int>();
            for (int i = 0; i <  numbers.Count/2; i++)
            {
                firstPart.Add(numbers[i]);
            }
            for (int j = numbers.Count-1; j >= numbers.Count/2; j--)
            {
                secondPart.Add(numbers[j]);
            }
            secondPart.Reverse();
            for (int i = 0; i < secondPart.Count; i++)
            {
                int firstDigit = secondPart[i] / 10;
                int secondDigit = secondPart[i] % 10;
                separated.Add(firstDigit);
                for (int j = 0; j < firstPart.Count; j++)
                {
                    separated.Add(firstPart[j]);
                    firstPart[j] = firstPart[j + 1];
                    break;

                }
                separated.Add(secondDigit);
            }
            Console.WriteLine(string.Join(" ",separated));
        }
    }
}