How are all these points related. (I'm looking for something like an operation or combination so there's a general characterization)
(5,1),(4,5),(7,4)(3,7),(8,3),(5,8),(7,5),(2,7),(7,2),(5,7),(8,5),(3,8),(1,5),(5,4),(7,3),(4,7)
The are reflective. (7,4) (4,7)
+93 
