for my $dat1 (@data1) {
    for my $dat2 (@data2) {
        my $filename = "file_$dat1\_$dat2.txt";
        print "<$filename>\n";
        open my $fh, '<', $filename or die "a horrible death $!";
    }
}


##</code><code>##

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,