I agree with @sampriti and @will135 100%. If HTB actually solved this based on the clue “Walzer Style” without seeing the solution , rated it 40pts and published it, then they need their heads checked. There’s no way I would have published this puzzle with that clue. Even if I saw the solution without trying to work it out first I wouldn’t have green lit this. This is just throwing crap at the wall to see what sticks. There’s no fun or reward for that.
They need better vetting. At least try to solve these before rating and publishing. As said before this challenge was nothing but trying to guess what is in the author’s head.