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

namespace _6.Stuck_Zipper
{
    class Program
    {
        static void Main(string[] args)
        {
            List < int > list = Console.ReadLine().Split(new char[] { },StringSplitOptions.RemoveEmptyEntries).Select(int.Parse).ToList();
            List<int> list1 = Console.ReadLine().Split(new char[] { }, StringSplitOptions.RemoveEmptyEntries).Select(int.Parse).ToList();

            for (int i = 0; i < list.Count; i++)
            {
                if (list[i] >= 10)
                {
                    list.RemoveAt(i);
                    i--;
                }
            }
            for (int i = 0; i < list1.Count; i++)
            {
                if (list1[i] >= 10)
                {
                    list1.RemoveAt(i);
                    i--;
                }
            }
            for (int i = 1,j=0; i < list.Count+list1.Count; i+=2,j++)
            {
                if (j >= list.Count)
                {
                    break;
                }
                if (i>list1.Count)
                {
                    i--;
                }
                list1.Insert(i, list[j]);
            }
            Console.WriteLine(String.Join(" ",list1));
        }
    }
}