use strict;
for	my $regex (qr/(.)oo(.)ar(.)az/, qr/fo(.)barba(.)/) {
	my $str = "foobarbaz";
	$str =~ s/$regex/
		my @a;
		for my $index (1 .. $#+) {
			push @a, substr($str, $-[$index], $+[$index] - $-[$index]);
		}
		join "," , @a;
	/e;
	print "$str\n";
}