No random tests,

This is not new.

From available documentation:

Use a novel/unique idea, avoid creating duplicate katas

Please unpublish this kata. Unfortunately, there is no sandbox for practising creating kata, but you don't have to publish them. When you do; (a) they clutter up CW's kata catalog, which already has too many duplicates, and (b) people will downvote it, your kata will be retired and you will lose points.

To get a better idea of what is already out there as a kata ( and there's a lot already out there! ), solving more than a handful of kata may be a good idea. For perspective: just JS has over 6 000 published kata. Most simple ideas have been done ( and most of them to death ).

Sample tests still have the issue I previously reported.