What i want to do is something like this:
1 2 3 4 5
6 7
8 9 10 11
With this code:
Justify only takes up the complete line when the text wraps to the next line. If you want it to wrap you need a narrower div width, and you need to remove your s.
You could start with something like this though (just not sure how to place the 7 at the same place as the 5 and the 11):
1 2 3 4 5
6
7
8 9 10 11