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12 Days of Christmas
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brainfuck
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ln 2
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Reversi
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Rule 110
Scrambled Sort
Set
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Sudoku (Fill-in)
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Tic-tac-toe
Time Distance
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Transpose Sentence
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United States
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Zeckendorf Representation
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γ
λ
π
τ
φ
√2
𝑒
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