If you are using Goryachev's Part 1, page 32 typically involves .

Adjust the pre-printed tree structure on pages 14–15 or 16–17 of the project notebook. Action: You need to cross out pairs of "leaves" (bottom-level spots) on the last level.

Look at the cover of your book (Matveeva, Goryachev, Bosova, or Semenov/Rudchenko).

Check if an object belongs to both sets (the intersection in the middle) or just one. How to find your exact answer:

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