05

using System;
using System.Text;
using System.Collections.Generic;

namespace ExamPreparation
{
    class Startup
    {
        static void Main()
        {
            string[] first = Console.ReadLine().Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
            string[] second = Console.ReadLine().Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);

            string firstAsString = ConvertToString(first);
            string secondAsString = ConvertToString(second);

            if (firstAsString.CompareTo(secondAsString) <= 0)
            {
                Console.WriteLine(firstAsString);
                Console.WriteLine(secondAsString);
            }
            else
            {
                Console.WriteLine(secondAsString);
                Console.WriteLine(firstAsString);
            }
        }

        private static string ConvertToString(string[] array)
        {
            StringBuilder result = new StringBuilder();

            for (int i = 0; i < array.Length; i++)
            {
                result.Append(array[i]);
            }

            return result.ToString();
        }
    }
}