using System;

public class Program

{

    static void Interschimb(ref int a, ref int b)

    {

        int aux;

        aux=a;

        a=b;

        b=aux;

    }

    public static void Main()

    {

        int a=int.Parse(Console.ReadLine());

        int b=int.Parse(Console.ReadLine());

    Interschimb(ref a, ref b);  

        Console.WriteLine(a+" "+b);

    }

}