exercise1

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  An Exercise.
  
  Given this puzzle:

a  6.. | ..7 | .41        POK Journal 060305 Five Dark Stars                                 
b  8.3 | .1. | .7.        23:46:17.270 060509                                                
c  ... | ... | 6..        Sig  222333344 112244444 222333344                                 
   ----+-----+----        Iteration counts       0  0  0                                     
d  4.. | ... | 7..    <-- Blank cell count      55                                           
e  .2. | 6.9 | .5.        Nonblank cell count  196                                           
f  ..5 | ... | ..8          |                                                                
   ----+-----+----          |                                                                
g  ..6 | ... | ...          V                                                                
h  .9. | .2. | 1.6  
i  71. | 3.. | ..4