Place each of the characters A, D, E, F, O, R, S and * exactly once in each row, column and 3×3 box. When you have completed the puzzle, the shaded squares will form a hidden message read left to right, then top to bottom. Each asterisk (*) represents an unknown character other than the letters A, D, E, F, O, R and S, possibly including numbers, punctuation or special characters.
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