Friends,

I have encountered one problem for the below input because the last character G of first line and the first character C of the next line are @allowed region. But when I get the output, G and C are not in allowed. This is because There is a space after the last character G. 

my @allowed = qw[ AA AG GC GT CA CG TT TC ];
my $allowed = join "|", @allowed;
my $regex   = qr/ N+ | (?: (?=$allowed) . )*  . /x;

$data="TGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG
+GGGGGGGGGGGGGGGGGGGGGATAG
C";
print "$_\n" for $data =~ m/$regex/g;

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ie instead to be printed as GC I get it as 

G
C

[download]
which is wrong Please give a solution.

Edit: g0n - code tags

In reply to Re^2: Extracting a substring according to some criteria by Benson
in thread Extracting a substring according to some criteria by Benson

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