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Hi,
This looks so simple but actually require some thinking.
I definitely had to look at the solution for this one, but it was a good exercise regardless.
My Simple static solution:
Similar to the sol but simpler!
Spoiler
Went for a dynamic approach to remove duplications rather than writing out particular filters (my initial approach)
Not elegant...
we need a combination/permutation builder macro.
😉
Here's my solution!