#!/usr/bin/perl -w

  local $\ = "\n";
  while (<>) {
    chomp;
    $_ && print $_>0 ? "positive $_" : "negative ".($_*-1);
  }
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#Remove those pesky ^M (note the ^V will not be visible)
perl -pi -e 's/^V^M//g' <filename>
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http://www.perlmonks.org/index.pl?node_id=138068&lastnode_id=137863
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