Plugin to prevent editors from seeing some pages and posts

I'm trying to figure out which wpmudev plugin can help me to hide some pages and posts from editors in my website. I mean in the backend and front end.
The idea is:
I have 50 pages I'm working with. I do not want the editors to see them until I release them.
Let's say that I do not want anyone besides me, to be able to see or edit the pages or posts I'm working on.

I've seen some external plugins, like Advanced Access Manager, but I'd rather use something available here.
Or any plugin recommended by you.

Thanks a lot!!