This is a case for a perl regular expression. It should look something like this, 

my $re = qr/^[A-Z][^_]*_[A-Z][^_]*_[a-z][^.]*\.html$/;

open my $fh, '>', 'badnames.txt' or die $!;

while (<DATA>) { 
    print $fh $_ unless m/$re/;
}

close $fh or die $!;

__DATA__
Kilo_Kili_asc.html
kilo_Kili_asc.html
Jiko_Huji_asc.html
Jiko_Huji_asc.htm
Puji_huki_asc.html
Puji_Huki_Asc.html

[download]
qr is a quoting operator which lets you precompile a regex for later use.

After Compline,
Zaxo

In reply to Re: Perl Scripting for testing by Zaxo
in thread Perl Scripting for testing by fairul82

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