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Code-Doku Joke

If a long dress is evening wear, what is a suit of armor?

Place each of the letters of EVIL SWARM 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: Tough

Here is a print-friendly version of this puzzle.

 

Please send responses to my email address is mathrec at this domain

Thanks,
Steve