using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        List<string> names = Console.ReadLine().Split(',').ToList();

        names.Reverse();

​

        for (int i = 0; i < names.Count; i++)

        {

        List<string> name=names[i].Split(' ').ToList();

        Console.WriteLine("{0} {1}",name[1] , name[0]);

        }

    }

}