I enjoyed .chunked().joinToString() part

It's a pity zer are only a kupl of desent reg exp katas zer. Zis one is boz funy und useful. Zunks :)

Very good kata, neither first glance solution, nor making you depressed after some failed tries. Wonder what kyu would be given to this kata but without letter count limit. For now idk how to solve that.

This kata implicitly requires that the song must not contain "wub" in any part of the word, this is not very good, I think

According to docs, .isProbablePrime(5) is not quite reliable, I prefer .nextProbablePrime()

At least in java, some test cases suggest that I have to trim trailing \n, while others don't accept this.

Smartass solution, but wouldn't it be cleaner with try-with-resources?

Smooth stream style solution, i like it

Oh god, why?

This is one of the worst katas i've seen. I have no idea, where to apply this 15% reserve. It turned out, not to each piece sticked to the wall (which could be useful). And finally the need to translate numbers to words is just a shame.