Each row and each column must contain one of each main shape (square, circle, curved square), one of each small shape (triangle, square, circle), and one of each position for the black shape. The missing figure must be a circle (main shape) with a triangle (small shape) to complete the set. [cite: 5338, 5340, 5342, 5343, 5344, 5345, 5346, 5347]