We have all the info we need.
we have 3 filenames
arr_pirate.rar
blank.txt
test.txt
ten under score
10_
ten_
10underscore
apart from meaning Guybrush: "arr! ahoy there Wally"
arr could also mean array.
Time to watch some BSG drink lots of caffeine and get cracking.
This will be solved today <_<