varnish 4.0 VCL error : Running VCC-compiler failed

I use varnish to optimize wordpress.

I use varnish 4.0, and following these operations,
vi /etc/varnish/default.vcl

# Drop any cookies sent to WordPress.
sub vcl_recv {
???? if ((req.url ~! "wp- (login | admin)")) {
???????? unset req.http.cookie;
???? }
}

# Drop any cookies WordPress tries to send back to the client.
sub vcl_backend_response {
???? if ((req.url ~! "wp- (login | admin)")) {
???????? unset beresp.http.set-cookie;
???? }
}

I /etc/init.d/varnish restart when executing this command

Got this error message.

Message from VCC-compiler:
Syntax error at
('input' Line 33 Pos 1)
? ? if (!(req.url ~ "wp-(login|admin)")) {
#-------------------------------------------

Running VCC-compiler failed, exited with 2

VCL compilation failed
 * Syntax check failed, not restarting

So，How to solve this problem?

Thanks!