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Doku-San Sudoku Slozhnye52 page 13.5x13.5 cm monthly magazine containing 40 Classic Sudoku and Diagonal Sudoku puzzles in hard and very hard difficulty levels. 
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Doku-San Sudoku Slozhnye52 page 13.5x13.5 cm monthly magazine containing 40 Classic Sudoku and Diagonal Sudoku puzzles in hard and very hard difficulty levels.
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