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Code Doku Joke

How do you make a hot dog stand?

Place each of the letters of CLEAR THIS exactly once in each row, column and 3×3 box. When you have completed the puzzle, the shaded squares will form the punch-line of the joke, read left to right, then top to bottom.

Difficulty: Fiendish

Here is a print-friendly version of this puzzle.

Please send responses to

Thanks,
Steve