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Japanese Puzzle Books for Adults Part One: Sudoku Classic, Calcudoku, Futoshiki, Hexadoku, Shikaku, and Killer Sudoku: Fun, Learn &: 9798785700499: Books - Amazon.ca
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Large Print Sudoku 16x16 - 100 Medium Puzzles: Hexadoku Puzzle Book for Adults - Sudoku Variant Game (Large Print Sudoku Variants): Hammond, Oliver: 9798701397321: Amazon.com: Books
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Large Print Sudoku 16x16 - 100 Medium Puzzles: Hexadoku Puzzle Book for Adults - Sudoku Variant Game: Hammond, Oliver: 9798701397321: Books - Amazon.ca
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16 x 16 Sudoku (Hexadoku) Volume 1: 100 Easy to Difficult Letter & Number Combination Puzzles: Publishing, Karabella, Puzzles, Big Brain: 9781717740724: Amazon.com: Books
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