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  1. or download this
    _data.txt_
abc:AB CD:100
...
ghi:GH IJ:102
abc:AB CD:100
ghi:GH IJ:103
  2. or download this
    my $file='source_data\data.txt';
open FILE, $file or die "FILE $file NOT FOUND - $!\n";
...
        }
}
  3. or download this
    _ouput_
abc:AB CD:100
abc:AB CD:100