Using grep, you can filter out duplicate fields by testing to see if they have been seen yet.

#!/usr/bin/perl
use strict;
use warnings;

my %seen;
{
    local $\ = "\n"; # call to print() ends in newline
    while (<DATA>) {
        chomp;
        print unless grep $seen{$_}++, split /\s+\+\s+/;
    }
}
[download]

Chris

Update: Misread the question, missed that they can occur reversed.

This should produce the results.

#!/usr/bin/perl
use strict;
use warnings;

my %seen;
{
    local $\ = "\n"; # call to print() ends in newline
    while (<DATA>) {
        chomp;
        my $sorted = join "", sort split /\s\+\s/;
        print unless $seen{$sorted}++;
    }
}

__DATA__
d_145_1_2- + c_3_1_8-e_74_1_1-
a_100_1_6-c_2_1_6- + b_50_1_2-
c_69_1_17- + b_61_6_1-
c_2_1_2- + a_123_1_1-
d_83_1_1- + c_2_1_5-d_162_1_1-
c_2_1_2- + a_123_1_1-
a_123_1_1- + c_2_1_2-
[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.