Ok got it, I'm pretty new to the site so don't have a ton of context for what would be useful. Do you think adding upper case and digits would make this worthwhile, or would it still be too much 'deja vu'?

Thanks for the feedback!

• By too much deja vu, do you mean this is too similar to other kata? Do you have a suggestion for what to do?
• I will add random tests.
• I left it at lower case letters too make it easier to do and explain. Certainly adding upper case and digits would make it more challenging!