If you don't mind the different order of the output then:

Sorry if I miss something, but your solution based on a hash, like all hash based ones seems aimed at uniqueness... but that doesn't seem a requirement as of the root node...

In reply to Re^2: Yet Another Rosetta Code Problem (Perl, Ruby, Python, Haskell, ...) by blazar
in thread Yet Another Rosetta Code Problem (Perl, Ruby, Python, Haskell, ...) by eyepopslikeamosquito

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