Doodle God：Puzzle - Independence Day in a Village

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Create Firecracker from stuff at hand

1. Stone + Stone = Fire + Stone + Stone
2. Grass + Domestic animal = Fertilizer + Milk
3. Life + Swamp = Bacteria
4. Bacteria + Water = Plankton
5. Plankton + Stone = Shells
6. Shells + Stone = Limestone
7. Limestone + Fertilizer = Saltpetre
8. Saltpetre + Sulfur = Gunpowder
9. Gunpowder + Fire = Firecracker

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