Which engine type does my 2012 Mazda3 have?

[Benyinka]

Hi,
I have a 2012 Mazda 3 (2.0L DOHC 16-valve SKYACTIV-G I4 engine) and I want to know the specific naturally aspirated type. I heard there are naturally aspirated 7, 8, G and F. How do I know which one is mine?