The given test cases assume the "Ja"'s and dots to be combined without spaces, while the actual test cases expect them to be seperated by spaces.

right, I forgot about that one...

• The puzzle tag, if any, isn't an excuse to just drop a kata where nothing is done properly.
  • If it's a puzzle, requirement do not have to be completely explained, but the sample tests then have to contain relevant inputs so that the actual requirements can be found. So far, that's not at all the case.
  • If it's not a puzzle, the description has to explain how to spot the "laughs".
• not enough random tests

In any case, the current setup is just bad.

No random tests.

And I've no idea why this got approved. :/

• Sample test results are inconsistent with actual test results. (e.g. "JaJa" and "..." expected in some tests)

• Description needs a lot of work. Specifications are inconsistent and incomplete.