using System;

using System.Linq;

​

namespace FoldAndSum

{

    public class Program

    {

        public static void Main(string[] args)

        {

            int[] sequence = Console.ReadLine().Split().Select(int.Parse).ToArray();

​

            int middleStartIndex = (sequence.Length / 2) / 2;

            int middleEndIndex = middleStartIndex + sequence.Length / 2;

​

            int summingIndex = middleStartIndex - 1;

​

            for (int i = middleStartIndex; i < middleEndIndex; i++)

            {

                int sum = sequence[i] + sequence[summingIndex];

                Console.Write($"{sum} ");

                summingIndex--;

                if (summingIndex < 0)

                {

                    summingIndex = sequence.Length - 1;

                }

            }

        }

    }

}