Ah, those are actually both great ideas. I think I'll have plenty to fix for now, I'll un-publish it for a now untill I've fixed everything.

Thanks for the help!

It was not me who downvoted you, you are right, and I will correct it in a sec. Thanks for all the advice! This is my first kata, and I was afraid I would make a lot of rookie mistakes. I can certainly use the advice, so thanks!

I've also rewritten the description (I will add a part about including error handling), do you have any other comments on the description? I found it's pretty difficult to give enough information to someone with no knowledge of music at all, while not being redundant and explaining too much.

I would suggest adding a lot more test cases. Now it's just guessing which words are going to be in, and hardcoding them. If you have hundreds of test case, that isnt possible anymore.

I don't know how, but my solution passes all the tests while it most definitely should not. It was still work in progress. I don't know if there is something wrong with the test cases or something else, but I'm not able to retract my solution or anything. Any help?