import java.lang.reflect.Array;
import java.util.*;
import java.util.stream.Collectors;

/**
 * Created by Austin on 31/10/2016.
 */
public class FoldAndSum
{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] ints = Arrays.stream(sc.nextLine().split(" "))
                    .mapToInt(Integer::parseInt)
                    .toArray();

        List<Integer> input = Arrays.stream(ints).boxed().collect(Collectors.toList());
        int k = input.size()/4;
        List<Integer> firstList = new ArrayList<Integer>();
        List<Integer> secondList = new ArrayList<Integer>();
        List<String> list = new ArrayList<>();

        firstList.addAll(input.subList(0, k));
        Collections.reverse(firstList);
        Collections.reverse(input);
        firstList.addAll(input.subList(0,k));
        secondList.addAll(input.stream().skip(k).collect(Collectors.toList()));
        Collections.reverse(secondList);
        secondList.subList(0,k).clear();


        for (int i = 0;i<input.size()/2;i++){
            list.add((String.valueOf (firstList.get(i)+secondList.get(i))));
        }

        System.out.println(String.join(" ", list));
    }
}