for(glob("*.gz")){
        my @o = `zcat $_ | sed 's/[<> ]//g'`;chomp @o;push @l,@o;
}
my %h = map { $_, 1 } @l;

##</code><code>##

- line1 xxxxx
- line2 yyyyy
- line3 zzzzz

##</code><code>##

- file1_line1 xxxxx
- file1_line2 yyyyy
- file1_line3 zzzzz
- filen_line1 xxxxxxx
- filen_line2 yyyyyyy
- filen_line3 zzzzzzz

##</code><code>##

xxxxx -> 1
yyyyy -> 1
zzzzz -> 1
xxxxxxx -> 1
yyyyyyy -> 1
zzzzzzz -> 1