using System;

public class Program

{

    public static void Main()

    {

        var song = SongDecoder("WubWEWUBAREWUBWUBTHEWUBCHAMPIONSWUBMYWUBFRIENDWUB");

        Console.WriteLine(song);    

    }

    public static string SongDecoder(string input)

    {

        if(input == null) return null;

        var word = "";

        var result = "";

        while(input.Contains("WUB")){

            word = input.Substring(0, input.IndexOf("WUB"));

            input = input.Substring(input.IndexOf("WUB") + 3);

            result += word;

        }

        return result.ToString();

    }

}