"cat" is a really nice touch for concatenation of those arrays! your solutions never fail my expectation.
by the way, i saw that "sub-func" comment...:)
Calling the two sub-functions the right way will not hurt your score. Great work though. :)
07 - Common functions and indexing 6
Area of a Square
multiply by three
Remove the first, third and fifth rows of a matrix
Horizontal matrix sort
Product of Each Column
Capitilize the first letter of every word in a string
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