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Code-Doku Joke

What did the mother broom say to the baby broom?

Place each of the letters of WE GOT IMPS exactly once in each row, column and 3×3 box. In addition to the letters, each row, column and 3×3 box will also contain one empty square. 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: Tricky

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