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Let A be a matrix whose first column is col1 and whose second column is col2.

Consider points P,Q,R,S and T,U,V,W in the input and output grids below:


How should we reorder the list T,U,V,W so that A sends P to the first point in the list, A sends Q to the second point on the list, A sends R to the third point on the list, and A sends S to the fourth point on the list?

 Oct 9, 2020
 #1
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As follows (I think!):

 

 Oct 9, 2020

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