Incidentally, if your array is really "gigantic" - so much so that you need to process it externally to Perl - you may want to write it to a file and sort it with the unix "sort" utility. The following two lines will do everything you want except for the hyphen after the count:

sort -k1n -k2n -k3n -k4n -k5n < inputfilename |
   uniq -c > outputfilename
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and the output will look like this:

      2 1 1 1 1 1
      1 1 2 1 1 8
      1 1 6 5 12 12
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