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

class Program
{
    static void Main()
    {

        List<int> numbers = Console.ReadLine().Split(' ').Select(int.Parse).ToList();

        List<int> fold1 = numbers.GetRange(0, numbers.Count() / 2);
        List<int> fold2 = numbers.GetRange(numbers.Count()/2, numbers.Count()/2);

        List<int> sum1 = new List<int>(numbers.Count() / 4);
        List<int> sum2 = new List<int>(numbers.Count() / 4);

        for (int i = 0; i < numbers.Count()/4; i++)
        {
            sum1.Add(fold1[i] + fold1[fold1.Count() - 1 - i]);
            sum2.Add(fold2[i] + fold2[fold2.Count() - 1 - i]);
        }

        sum1.Reverse();

        for (int i = 0; i < numbers.Count() / 4; i++) Console.Write("{0} ", sum1[i]);
        for (int i = 0; i < numbers.Count() / 4; i++) Console.Write("{0} ", sum2[i]);
    }
}