didn't work on the following argument array: 4ic6j - Expected: '3pen', instead got: 'invalid word'
didn't work on the following argument array: 4ty439 - Expected: '2ante-pen', instead got: 'invalid word'
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Sometimes I can catch the above error in random tests. The original solution seems to treat such cases wrong.

Python:

• Missing it block in sample tests

• Imports are missing

• Random tests make no sense in this kata, there are only 8 scale degrees anyway.
• Actually, the entire kata does not make sense. Each octave contains the key G twice? Or does each octave start on a different degree?

You can pass some tests if you provide array with decimal codes od letters.

• Node 18. should be enabled (Refer this and this for more info)

Description should define what is supposed to be considered a syllab here (syllabification in English is far from being a trivial question in general, and this is supposed to be a programming challenge, not a linguistics exam; I guess the kata only tests obvious cases, but anyhow something is missing).

Random tests (in JavaScript at least) use too limited a range of inputs; a hardcoded solution can be easily derived.

Ruby 3.0 should be enabled.

Python testing allows for incorrect solutions to pass, critically so in regards to the simple upper edge case of 100; here's an extreme example.

C++ Translation

Edge cases at len = 100 and 101 might be helpful. There are no guaranteed test cases at these lengths.

Some solutions will reject a string of 100 characters, yet still pass the test cases.

Python translation added

Maybe include a Test for n=3.166312747397789. I've seen a solution which would output 8 as result.