A child has a set of 96 distinct blocks. Each block has one

A child has a set of 96 distinct blocks. Each block has one of the following characteristics 2 materials (plastic, wood), 3 sizes (small, medium, large), 4 colors (blue, green, red, yellow), and 4 shapes (circle, hexagon, square, triangle). How many blocks in the set are different from the 'plastic medium red circle' in exactly two ways? (The 'wood medium red square' is such a block).