M     H S    
    T E         H
      N     D M  
      T          
        L     S D
  T       D N    
          T     M
D H     M E      
      S       N  

Code-Doku Joke

What do you call a calf after it's nine months old?

Place each of the letters of SLED MONTH 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: Tricky

Here is a print-friendly version of this puzzle.

 

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

Thanks,
Steve