sig5

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  6.. | ..7 | .41  4
  8.3 | .1. | .7.  4 
  ... | ... | 6..  1
  ----+-----+----  
  4.. | ... | 7..  2
  .2. | 6.9 | .5.  4
  ..5 | ... | ..8  2
  ----+-----+----  
  ..6 | ... | ...  1
  .9. | .2. | 1.6  4
  71. | 3.. | ..4  4
                                           sorted
  433   222   334      <- column counts   222333344
  
  441   242   144      <- row count       112244444

  324   323   423      <- block counts    222333344
  
  222333344  11224444  222333344
    block      row      column