@terms=qw(foo bar b.*az);
my $re = qr{(?:${\(
                 join "|", map { qr{\Q$_\E} } @terms
              )})};
print "$re\n";


##</code><code>##

$h=$ENV{HOME};my@q=split/\n\n/,`cat $h/.quotes`;$s="$h/."
."signature";$t=`cat $s`;print$t,"\n",$q[rand($#q)],"\n";