How many stereoisomers of octahydroquinoline are there?

I am trying to work out how many stereoisomers there could be of the following.


[![2,3,4,4a,5,6,7,8-octahydroquinoline](https://i.stack.imgur.com/AQhP6.png)](https://i.stack.imgur.com/AQhP6.png)


As indicated, I think there are two sites of varying the stereochemistry. The top site can have the hydrogen in different positions. However, can the bottom site be changed? I don't own a model set and so I am really struggling to see this!


