In the yellow cells surrounding the grid are letters that can be slid into place to form words, crossword fashion. Two letters have already been placed and the letters at top and bottom can slide as many positions vertically as necessary (they can slide past, or rather through, each other); the letters at left and right slide horizontally into place.
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M
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G
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D
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N
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E
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R
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A
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A
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P
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A
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S
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O
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E
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A
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E
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M
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G
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J
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O
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T
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From Mensa Puzzle Calendar 2018 by Fraser Simpson, Workman Publishing, New York. Puzzle for June 27.
MADARAGAPE
MOJOS
AGENT
Maybe there are less esoteric options....