When I read this goal, I just thought I have to use a 'grep' or 'uniq' after using a 'xxd'.
because I've solved previous problems in that way.
it was a wrong way.
In addition, I misunderstood the 'Level Goal' due to my bad reading skill.
Eventually, I searched a write up on the google and realized my mistakes.
I just want to give you some keys not fully write-up to solve this problem yourself.
First, Use the command, 'file' to solve this level.
I think It's very import key to solve this problem.
but it's not written on the command list of the site.
I realized that I have to use all commands which learned in previous level.
Second, keep in mind the file is 'compressed repeatedly'.
That's all
I wish you to get more insight through this level.
BYE



