J-G, thanks for the problem. Could you add some more information about expected inputs and outputs? An example and some more tests would be helpful too. If your test suite has exactly one test, it's trivial to write a correct answer.
Distance walked 3D
Count decimal digits of a number
Robust alignment of coordinate system
Wayfinding 2 - traversing
Order of things - 4
Wayfinding 5 - Travel contour
Wayfinding 1 - crossing
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