I haven't read your other question. But you're about half-way there. If @output holds the data that you want saved, you next need to do something like this:
open my $out_fh, '>', 'filename.txt' or die $!;
print $out_fh @output;
close $out_fh or die $!;
That's a simple means. But you'll probably need to modify it to better suit your needs, which weren't really fully described in this thread.
perlintro will take about a half hour to read. One of the sections in that document contains a brief introduction to file input and output.
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