Yike, didn't read the full quest. dict_scores waas preloaded. :-(

I agree with you. I m obssessed with this question. Every other day i would check it for some ideas. So far always failed one of the tests. I am trying to use recursive expression. Not sure if it is right direction.

@rowcased I c. Thank you. I first want to comment "no Brainer" for this question. Then when I clicked 'attempt' twice and twice it failed because it had a special character in the fixed tests.
I reread the question and realized it said, if input didn't have any letters, have to return with all caps.

That's why I was surprised to see how this code went thru.

I had to change this code because for me this one didn't pass one special character. Is our final sample tests randomly picked?

is this kata telling me the amino acids can only come from this residues=["A", "I", "L", "M", "F", "W", "Y", "V"] There are 20 amino acides. so those non-hydrophobic amino acids will never be checked in the sample tests?

I agree with you. I cannot believe it. Way easier than some of the 7kyu kata i solved in the last couple of days.

@Chrono79 What?! But ok, I will think in a different way. Thank you!

@Chrono79. Sorry I forgot to mark it.

It is a math problem, not a coding problem.