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Both shapes have the same number of holes. Try it yourself. Start with a cube of playdo. Take a chopstick and push it through until it pokes out. Expand each hole. Repeat until each face has a hole. You only need to poke 5 holes in the cube to create the final shape. The first poke creates an opening in the top and bottom. Each following poke adds a hole to one of the 4 side faces.