C = {(1,2),(1,5),(2,1),(2,4),(3,3),(3,6),(4,2),(4,5),(5,1),
(5,4),(6,3),(6,6)}
A ∩ B = {(2,2)}
A ∩ C = {(2,4),(4,2),(6,6)}
A B = {(2,4),(2,6),(4,2),(4,4),(4,6),(6,2),(6,4),(6,6)}
A C = {(2,2),(2,6),(4,4),(4,6),(6,2),(6,4)}
B ∩ C = {(1,2),(2,1)}
B C = {(1,1),(1,3),(2,2),(3,1)}
C A = {(1,2),(1,5),(2,1),(3,3),(3,6),(4,5),(5,1),(5,4), (6,3)}
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