I disagree: the difficulty of the problem does not lie in discovering these rules, but rather implementing a solution to filter them. I had a solution that followed every rule showed in the description and sample problems, yet it didn't pass simply because some new rules were introduced in the hidden tests. I then painfully spent some minutes figuring out what hidden rules the hidden tests were expecting, which imo took some fun from the problem, which is quite nice.

The problem description is lacking some things: the double-space behavior (i.e. consecutive whitespace isn't allowed for the address), a list of "junk" characters (which from the attempts I guess they're ?$/,;*:, although some could be missing), that _ should be replaced with a single space, etc.

Great kata! I think it would be helpful to list the punctuation marks explicitly (the given test cases don't contain any, it could also be helpful to add an extra case), which by the hidden tests seem to be .,;"'?!.

After completing the challenge (I've been struggling for some hours) I see you forgot to add a key feature. Remember each year three chickens are added, and you haven't taken that into account.

I feel like the instructions could be more clear especially with the order of the events, but cool kata!

You have far too many tests for this problem. I don't think the difficulty of this problem even fits 8 kyu begginers