Pretty confusing description. It took me longer to understand the question than to solve it. I'll re-edit this post, and try to rephrase the description. This puzzle is fun but if we can't understand the instructions, it really ruins the fun.

I agree and understand the intent it's just that some katas', as you mentioned, have a vague description and as a non-native english speaker, I sometimes guess what they want me to do. But I think it's still a nice feature to have, as a newbie programmer, I still have a lot to understand especially when some of the kata's test specs are very tricky that I haven't even experienced and will not really understand what I did wrong.

Knowing what the specs of the test is. Sometimes when I try to submit my solution, it's failing on some tests and I don't know what should I change in my code.