Woah, take it easy man.
Ok so, “the file name they are providing IS the file name you need to be using”
Let’s say level 8 file is: level8.txt
Let’s say level 10 file is: level10.txt
For level 8 you need to access level8.txt and for level 10 you have to access level10.txt, that’s it.
Use the same method you used for level8 but this time use the file provided by level10.