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12 Days of Christmas
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Arabic to Roman
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brainfuck
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Factorial Factorisation
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ISBN
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ln 2
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Reversi
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Rule 110
Scrambled Sort
Set
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SI Units
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Star Wars Opening Crawl
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Sudoku (Fill-in)
Ten-pin Bowling
Tic-tac-toe
Time Distance
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Topological Sort
Transpose Sentence
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United States
Vampire Numbers
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Zeckendorf Representation
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γ
λ
π
τ
φ
√2
𝑒
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Calendar
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