(fliplr ([1, 2; 3, 4]) == [2, 1; 4, 3]
 && fliplr ([1, 2; 3, 4; 5, 6]) == [2, 1; 4, 3; 6, 5]
 && fliplr ([1, 2, 3; 4, 5, 6]) == [3, 2, 1; 6, 5, 4])
