My grandson has a Melissa & Doug puzzle that consists of 5 reversible boards in which you must place certain geometric shapes to
complete the picture.
Here are the front sides of the five puzzles: 
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Here are the corresponding reverse sides of the five puzzles: 
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What is the minimum number of each of the five shapes (square, circle, ellipse, triangle, and rectangle) that is needed so that the child can make either side of all five puzzles?