I'm really confused... I wrote some code for the previous part of this task, it was validated, then when I opened the next part of this task my code was gone and replaced with codegym generated code. I'm really confused why it's happening? If my code was correct (passed validation in the previous part) why was it replaced? Isn't the point of this big tasks to have a program written by myself at the end? Also what's the point of testing the program at the very end if all I wrote got replaced between parts?