Hi, a Kata a day.. remember?)

You're welcome.

You should take each square with its all adjacent squares or rectangles to form the resulting true rectangles list.

The pink and the blue squares aren't adjacent, you can't replace one of them with the yellow one and form another rectangle.

You have there the triple [45, 108, 117], is pythagorean but not primitive, a, b, c are divisible by 3