"One at a time, three players grab a club, swim out to a platform, climb it, smash a plaster box while jumping off to release a key, grab it, and swim back to shore. Once six keys have been retrieved (each swimmer must get at least one), two others use them to open a chest, grab the eight puzzle pieces from inside, and use them to assemble a ‘map of the world’." ~ @SurvivorWiki
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They win potatoes and peanut butter!
They can also send one player from the losing tribe to Exile Island.
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They send Jenny.
Proceed to exile island.