Thanks!
Level 4 should be pretty simple if you try it again.
Level 7 is a pretty weird one, but I would recommend not skipping over it.
If you do want a hint for level 7: (rot13) Gur vavgvny ynlbhg bs xrlf naq ybpxf vf n uvag
I got 7-10. Tried 4 again. Failed. Writing out why 4 wasn't possible finally got me the solution.
