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This story comes from the Urals, Russia. It says
a local boy Danila while still an apprentice took semiprecious Ural
stones and chiseled two flowers whose leaves, stems and petals could
be separated - something like that shown in the diagram. From the
parts of these flowers it was possible to make a circular disk.
Can you put the petals, stems and leaves together so that to make a
circle? It is allowed to rotate the parts but not overlap them.
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