1. All new notes are marked childless.
2. Childless notes must pair with other notes to synthesize a child.
3. After creating a child, the parent notes lose childless status.
4. The new child note is itself childless.
5. Repeat the pairing process for all childless notes and existing notes until no further meaningful syntheses arise.
6. Prioritize pairing childless notes together before pairing with non-childless notes

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