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JAT-2018: opposites
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JAT-2018: (no) windows
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JAT-2018: touché !
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JAT-2018: metal and concrete
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JAT-2018: concrete, metal and wood
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JAT-2018: triangles aplenty
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JAT-2018: below stairs
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JAT-2018: shaping up
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JAT-2018: Swiss pyramid 1/2
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JAT-2018: chasm
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JAT-2018: over and under
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JAT-2018: cornered
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JAT-2018: in a twist
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JAT-2018: puzzle
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JAT-2018: conundrum
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JAT-2018: stepping up
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JAT-2018: the broader picture
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JAT-2018: looking up