Is using the word 'of' necessary here?
Hello citizens of italki.
Could you tell whether I need to use 'OF' in this sentences or not, and what does it imply?
1) She is looking out OF the window.
2) She is looking out the winfow.
3) I poked my head out the school door.
4) I poked my head out OF the school door.
thanks a lot.