I think it would be a good idea to add two more test-cases to the default ones. Namely the Cheshire cat and the one where 'shire' is surrounded by non-alphabetical characters.

Added in description that y is not a vowel :)

I think the TLDR explains that pretty well. It says that the keywords may be found anywhere within either of the fields

Suits me. Sold!

Thanks. I added the new test case.

This might make more sense as a 7

Everything is relative - I made some even more simple katas, like an introduction to programming...

You can find a list of difficulties here:

https://docs.google.com/document/d/1eseD5xyhGdtQ-DaWdqfK2yf6mvTDWHWEpkQGBppI8cw/edit

Where would you put it? 7 kyu or 6 kyu?