using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(AddSpaces("ThisIsATestInput"));

    }

    public static string AddSpaces(string text)

    {

        "ABCDEFGHIJKLMNOPQRSTUVWXYZ".ToList().ForEach(x => 

        {

            text = text.Replace(x.ToString(), " " + x);

        });

        return text;

    }

}