using System;

namespace yukicoder
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] s = Console.ReadLine().Split(' ');
            string a = s[0];
            string b = s[1];
            string c = "";
            bool f = a.Equals(b);
            if (f==false)
            {
                c = a;
                a = b;
                b = c;
            }
            Console.WriteLine(a+" "+b);
        }
    }
}