Hi Anonymous Monk, I have had quite a thought about it and I think the thing I would most likely do is to first reduce complexity by removing all duplicated lines with the same integer infront of them. Is this right. I tried running the script below and then ran the script above -jgg.pl. But the result are not good. Any ideas or suggestions how I could marry the two in a sensible fashion 

my $file = 'my_data_file.txt';

my %seen = ();

{
      local @ARGV = ($file);

      #local $^I = '2.txt';
  
      while(<>){
  
      $seen{$_}++;
  
      next if $seen{$_} > 1;

      print;
  
      }
  
      }

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In reply to Re^2: Count similar characters in a row - only once by $new_guy
in thread Count similar characters in a row - only once by $new_guy

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