Would it be sensible to do something like create a hash like follows

%xy
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where .. in a loop of some sort I could create the ranges, for example:

for($x = 0; $x = $max; $x++)
{
   for($y = 0; $y = $max; $y++)
   {
      $key1 = $x;
      $key2 = $y;
    }
}
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Then compare my input data with the predefined ranges and increment a counter of some kind?