{'be': {'t': {}, 'g': {}}}

Those would have the same result ("be" is a prefix of both "bet" and "beg", the initial "be" in the first example will simply have no effect/will already be there). If it helps: try going through a few examples in random order, i.e. building a tree from the same arguments, but with a different ordering of them. That way, different cases emerge and you'll see how to handle them (or whether they are so different in the end).

Can you clarify for example what would be the difference between
radixTree("be", "bet", "beg") and radixTree("bet", "beg")
as I am a little confused over the syntax.

I tend to agree, this is probably better ranked at 5kyu, though 6 isn't too far off, to be fair. While it has so few solvers, re-ranking is probably still very possible, though I would discuss this with the discord first to get a better idea of the average user's perspective.

@WestwardLand968: Actually, they can be changed. Number of katas have been reranked or deranked. However, this involves kazk's assistance.

@Nickkk: I agree with you, but I don't want to undertake "the administrative part". Raise this via a GitHub issue, if you want.

Regards, suic

Rank can't be changed

I think this kata is a bit too hard for 6 kyu. Consider bumping it up to 5 kyu.

Oh no, it's worse. For some reason author flips labyrinth 90 degrees from it's string representation. Why?