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    line 24 - remove double " 
    #open my $fileone, '<', "$folder/$file" or die ""$folder/$file": $!";
    
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    die "'$folder/$file': $!";    # choose a different literal character
    die "\"$folder/$file\": $!";  # escape the inner "
    die qq{"$folder/$file": $!};  # use an alternative outer delimiter