Same issue as iliuxe1409 below - please see answer by lechevalier !

Bazoogle has explained it perfectly. With your example, there is no ambiguity, so the specification is indeed to return 25689.

Agreed! Like most code where you try to make it short beyond reasonable, but that was the challenge here.

Wouldn't this count an 8-year old as a teen?

Yes, they can! My apologies for the poor indentation here, though. It is possible to use this construct in a much more readable way.

It says it expects "94-90" instead of "94,93-90".

Obstacle events when the door is not moving are odd and only happen in a few recent translations. I would prefer to fix the translations rather than consider this behaviour acceptable and update the description.

What language did you use? (you didn't publish your solution so we cannot see it)

Did you look at the other solutions in that language?

Yes, the 4kyu is probably overrated.

@belzuk I don't see any random tests, did you translate them?

Done, thx!

Thank you Blind! I have updated the description and added all tests (under "a few fixed situations")

OK, I'm including this as initial solution.

Please let me know if this is too much guidance!