using System;
using System.Linq;

namespace _05._Compare_Char_Arrays_Veronika
{
    class Program
    {
        static void Main(string[] args)
        {
            char[] firstInput = Console.ReadLine().
                Split().Select(char.Parse).ToArray();
            char[] secondInput = Console.ReadLine().
                Split().Select(char.Parse).ToArray();

            int minLength = Math.Min(firstInput.Length, secondInput.Length);
            if (firstInput.Length == secondInput.Length)
            {
                for (int i = 0; i < firstInput.Length; i++)
                {
                    if (firstInput[i] > secondInput[i])
                    {
                        Console.WriteLine(string.Join("", secondInput));
                        Console.WriteLine(string.Join("", firstInput));
                        break;
                    }
                    else
                    {
                        Console.WriteLine(string.Join("", firstInput));
                        Console.WriteLine(string.Join("", secondInput));
                        break;
                    }
                }
            }
            else
            {
                for (int i = 0; i < minLength; i++)
                {
                    if (firstInput.Length > secondInput.Length)
                    {
                        if (firstInput[i] == secondInput[i])
                        {
                            Console.WriteLine(string.Join("",secondInput));
                            Console.WriteLine(string.Join("",firstInput));
                            break;
                        }
                        else if (firstInput[i] > secondInput.Length)
                        {
                            Console.WriteLine(string.Join("", secondInput));
                            Console.WriteLine(string.Join("", firstInput));
                            break;
                        }
                        else
                        {
                            Console.WriteLine(string.Join("", firstInput));
                            Console.WriteLine(string.Join("", secondInput));
                            break;
                        }
                    }
                    else if (firstInput.Length < secondInput.Length)
                    {
                        if (firstInput[i] == secondInput[i])
                        {
                            Console.WriteLine(string.Join("", firstInput));
                            Console.WriteLine(string.Join("", secondInput));
                            break;
                        }
                        else if (firstInput[i] > secondInput.Length)
                        {
                            Console.WriteLine(string.Join("", firstInput));
                            Console.WriteLine(string.Join("", secondInput));
                            break;
                        }
                        else
                        {
                            Console.WriteLine(string.Join("", secondInput));
                            Console.WriteLine(string.Join("", firstInput));
                            break;
                        }
                    }
                }
            }
        }
    }
}