From what I can see, you are trying to pop fourth item in "sausage_row" which only has three items (in the first sample test).

The intention is that you don't know all types of sausages that exist, so you have to identify them using their packaging (and as natan wrote, other specifics of a good sausage package). All of the necessary info is in the Kata's description.

there is a problem with interpreter.
i use vscode and my code works on it, but it doesnt work in here