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Congratulations to Alastair and Leopold of the 3rd grade, and Hannah B. of the 4th grade for finding all 19 hexagons of perimeter 16 that can be drawn on the square lattice. See Hannah's solution below.
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Congratulations to Alastair and Leopold of the 3rd grade, and Hannah B. of the 4th grade for finding all 19 hexagons of perimeter 16 that can be drawn on the square lattice. See Hannah's solution below.