Your explanation is difficult to understand. It would have been easier for you and clearer to someone trying to answer your questions if you had just written:

I have this string:

my $str = 'XXXX - AAAA - - XXXXXXX XX - XXXXX XX TNBBBBB ';
[download]

...and I want to end up with this hash:

my $data = (
   'keyA' => 'AAAAA',
   'keyB' => 'BBBBB'
);
[download]

...or whatever it is you want.

If you have this string:

my $str = "XXXX - 12345 - - XXXXXXX XX - XXXXX XX TN67890";
[download]

and you want to get 12345 and 67890 into a hash, you can do this:

use strict;
use warnings;
use 5.010;

my $str = 'XXXX - 12345 - - XXXXXXX XX - XXXXX XX TN6789';
my @pieces = split /\s+/, $str;

my $val1 = $pieces[2];
(my $val2 = $pieces[-1]) =~ s/^TN//;

say $val1;
say $val2;

my %hash = (
    'keyA' => $val1,
    'keyB' => $val2
);

say %hash;

--output:--
12345
6789
keyB6789keyA12345
[download]

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.