Now you've been 3 years with Python and 2 Kyu. Not bad.

Damn this is what i spent like an hour trying to do, didn't know why arr[1:-1] was not being accepted. Now I see the [] for index had to be outside of the (). Cool.

Read the error message:

ValueError: min() arg is an empty sequence

See which sample test your code fails, then fix your code. There'll be more problems too:

Do not mutate the original array/list.

I see, thanks for the tip. I´ll have to learn to use elif more.

That's because you didn't use elif. But it shouldn't matter if you return the price instead of printing it, return ends the function.

I was going for this but couldn't figure out how to use the strip in the same line.
End up adding a second line with: return words.strip('')
:-(