$nee1 = AGGA
$nee2 = CGCCAC
#What I want is the following in regular expression: 

$hay =~ /($nee1)T[ATGC]($nee2)/

##</code><code>##

my $nee = 'AGGATACGCCAC';
## $nee1   ^^^^
## T?          ^^
## $nee2         ^^^^^^