Your question is still remarkably unclear. What is X, Y and Z? In your filename, all I see are a couple Xes.

If you've got an ordered list of data, (which is what I surmise from your keynames of 'first', 'second', and 'third'), why are you using a hash instead of an array?

Be very specific about what you're trying to accomplish. No more nonsensical sample data. Show us what you have and what you're trying to do with it and what code you've written.